Publications

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Zielgruppennavigation


With the paper, "Intermediates in ammonothermal GaN Crystal Growth Under acidic ammonolysis Conditions" (sub-project 1 and 2), the authors were invited to design the cover of the journal:


The project-specific publications of the individual projects are listed here.

Subproject 1

Publications:

P. Pust, S. Schmiechen, F. Hintze, W. Schnick,
„Ammonothermal Synthesis and Crystal Structure of BaAl2(NH2)8·2NH3”,
Zeitschrift für anorganische und allgemeine Chemie 639 (2013) 1185.

S. Zhang, F. Hintze, W. Schnick, R. Niewa,
„Intermediates in Ammonothermal GaN Crystal Growth Under Ammono-acidic Conditions”,
European Journal of Inorganic Chemistry 32 (2013) 5387.

J. Häusler, L. Neudert, M. Mallmann, R. Niklaus, A.-C.L. Kimmel, N.S.A. Alt, E. Schlücker, O. Oeckler, W. Schnick
Ammonothermal Synthesis of Novel Nitrides: Case Study on CaGaSiN3
Chem. Eur. J. 2017, 23, 2583-2590

R. Niklaus, J. Minar, J. Häusler, W. Schnick
First-principles and experimental characterization of the electronic properties of CaGaSiN3 and CaAlSiN3: the impact of chemical disorder
PCCP 19 (2017) 9292.

J. Häusler, S. Schimmel, P. Wellmann, W. Schnick
Ammonothermal Synthesis of Earth-abundant Nitride Semiconductors
ZnSiN2 and ZnGeN2 and Dissolution Monitoring by In Situ X-ray Imaging

Chem. Eur. J. 23 (2017) 12275.

N. Cordes, W. Schnick
Ammonothermal Synthesis of Crystalline Oxonitride Perovskites LnTaON2
(Ln = La, Ce, Pr, Nd, Sm, Gd)
Chem. Eur. J. 23 (2017) 11410.

M. Mallmann, J. Häusler, N. Cordes, W. Schnick
Ammonothermal Synthesis of Alkali-Alkaline Earth Metal and Alkali-Rare Earth Metal Carbodiimides: K5−xMx(CN2)2+x(HCN2)1−x (M = Sr, Eu) and Na4.32Sr0.68(CN2)2.68(HCN2)0.32
Z. Anorg. Allg. Chem. 643 (2017) 1956.

J. Häusler, R. Niklaus, J. Minár, W. Schnick
Ammonothermal Synthesis and Optical Properties of Ternary Nitride Semiconductors
Mg-IV-N2, Mn-IV-N2 and Li-IV2-N3 (IV = Si, Ge)
Chem. Eur. J. (2018)  DOI: 10.1002/chem.201704973

J. Häusler,L. Eisenburger, O. Oeckler, W. Schnick
Ammonothermal Synthesis and Crystal Structure of the Nitridoalumogermanate
Ca1-xLixAl1-xGe1+xN3 (x ≈ 0.2)
Eur. J. Inorg. Chem. (2018) (DOI: 10.1002/ejic.201701314)

Talks:

J. Häusler,
"Ammonothermalverfahren und Methathesereaktionen für die Synthese von binären und höheren Nitriden",
1. Obergurgl-Seminar für Festkörperchemie, 28. - 31. Januar 2014, Obergurgl, Österreich

N. Cordes,
"Ammonothermalsynthese neuer Oxonitridoperowskite",
2. Obergurgl-Seminar für Festkörperchemie, 26. - 29. Januar 2016, Obergurgl, Österreich

Poster:

D. Schmidl
"New insights into the ammonothermal synthesis of ternary and quaternary nitrides"
Undergraduate Research Conference on Molecular Sciences (URCUP), 02.-03. Juli 2016, Kloster Irsee

T. de Boer, P. Strobel, J. Häusler, W. Schnick, A. Moewes
"Band Gap and Electronic Structure of Zn(Ge,Si)N2: Probing Defects Using XEOL"
Advanced Light Source (ALS) User Meeting, Berkeley, California, (USA), October 2 - 4th 2017.


Subproject 2

Publications:

 S. Zhang, D. A. Zherebtsov, F. J. DiSalvo, R. Niewa,
Na5[CN2]2[CN], (Li,Na)5[CN2]2[CN], and K2[CN2]: Carbodiimides from High-Pressure Synthesis”,
Z. Anorg. Allg. Chem. 638 (2012) 2111 (DOI: 10.1002/zaac.201100413).

 S. Zhang, R. Niewa
Novel Amides and Amines of Gallium: A Brief Discussion on Synthesis and Their Crystal Structures”,
Z. Kristallogr. Suppl. 32 (2012) 103.

 R. Niewa, S. Zhang, T. Richter,
„Chemistry of Ammonothermal Nitride Growth”,
Z. Kristallogr. Suppl. 33 (2013) 26.

 T. Richter, S. Zhang, R. Niewa,
„Ammonothermal Synthesis of a New Modification of K2[Zn(NH2)4]”,
Z. Kristallogr. Suppl. 33 (2013) 82.

 R. Niewa, S. Zhang,
„Intermediates during Ammono-basic Crystal Growth of GaN”,
Z. Kristallogr. Suppl. 33 (2013) 127.

 T. M. M. Richter, S. Zhang, R. Niewa,
„Ammonothermal Synthesis of Dimorphic K2[Zn(NH2)4]”,
Z. Kristallogr. 228 (2013) 351 (DOI: 10.1524/zkri.2013.1674).

 S. Zhang, F. Hintze, W. Schnick, R. Niewa,
„Intermediates in Ammonothermal GaN Crystal Growth Under Ammono-acidic Conditions”,
Eur. J. Inorg. Chem. 31 (2013), 5387 (DOI: 10.1002/ejic.201300958).

 S. Zhang, N.S.A. Alt, E. Schlücker and R. Niewa
„Novel Alkali Metal Amidogallates as Intermediates in Ammonothermal GaN Crystal Growth”,
J. Cryst. Growth 403 (2014), 22 (DOI: 10.1016/j.jcrysgro.2014.06.015).

 T. M. M. Richter, R. Niewa,
"Chemistry of Ammonothermal Synthesis",
Inorganics, 2 (2014), 29 (DOI:10.3390/inorganics2010029).

 B. Hertweck, S. Zhang, T. G. Steigerwald, N. S. A. Alt, R. Niewa, E. Schluecker,
"Applicability of metals as liner materials for the ammonoacidic crystal growth",
Chem. Eng. Technol. 11 (2014) 1835

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Ammonothermal Synthesis of Li4[Zn(NH2)4](NH2)2 and Cs2[Zn(NH2)4]",
Z. Anorg. Allg. Chem. 640 (2014) 2386.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
"SrBa2(NH2)6: A new ternary amide from ammonothermal synthesis",
Z. Anorg. Allg. Chem. 641 (2015) 234.

 S. Schimmel, M. Lindner, T. G. Steigerwald, B. Hertweck, T. M. M. Richter, U. Künecke, N. S. A. Alt, R. Niewa, E. Schlücker, P. Wellmann,
"Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution",
J. Cryst. Growth 418 (2015) 64.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Ammonothermal synthesis and characterization of Li4[Zn(NH2)4](NH2)2",
Z. Anorg. Allg. Chem. 641 (2015) 1016.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
"SrBa2(NH2)6: A new ternary amide from ammonothermal synthesis",
Z. Kristallogr. Suppl. 35 (2015) 80.

 T. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Trigonal bipyramidal coordination of Zn2+ in Zn(NH3)2F2 and Zn(NH3)3F2",
Z. Kristallogr. Suppl. 35 (2015) 135.

 H. Cao, T. M. M. Richter, C. Pistidda, A.-L. Chaudhary, A. Santoru, G. Gizer,
R. Niewa, P. Chen, T. Klassen, M. Dornheim,
"Alkali metal amidozincates for hydrogen storage",
ChemSusChem 8 (2015) 3777.

 T. M. M. Richter, S. Le Tonquesse, N. S. A. Alt, E. Schlücker, R. Niewa,
"Trigonal-Bipyramidal Coordination in First Ammoniates of ZnF2: ZnF2(NH3)3 and ZnF2(NH3)2",
Inorg. Chem. 55 (2016) 2488.

 J. Hertrampf, N. Alt, E. Schlücker, R. Niewa,
"Ammonothermal Synthesis and Crystal Growth of Indium Nitride",
Z. Kristallogr. Suppl. 36 (2016) 73.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Subsequent condensation in [Zn2(NH3)2(NH2)3]Cl and [Zn(NH3)2(NH2)]Br: towards ammonothermal crystal growth of Zn3N2",
Z. Kristallogr. Suppl. 36 (2016) 90.

 H. Cao, A. Santoru, C. Pistidda, T. M. M. Richter, A.-L. Chaudhary, G. Gizer,
R. Niewa, P. Chen, T. Klassen, M. Dornheim,
"New synthesis rout for ternary transition metal amides as well as ultrafast amide-hydride hydrogen storage materials",
Chem. Comm. 52 (2016) 5100.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Ammonothermal Synthesis and Characterization of Cs2[Zn(NH2)4]",
Z. Anorg. Allg. Chem. 642 (2016) 1207.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, M. Knetzger, E. Meissner, R. Niewa,
„Ammonothermal synthesis of GaN using Ba(NH2)2 as mineralizer”
J. Cryst. Growth 456 (2016) 2-4 (doi:10.1016/j.jcrysgro.2016.08.024).

 T. M. M. Richter, S. Strobel, N. S. A. Alt, E. Schlücker, R. Niewa,
„Ammonothermal synthesis and crystal structures of diamminetriamidodizinc chloride [Zn2(NH3)2(NH2)3]Cl and diamminemonoamidozinc bromide [Zn(NH3)2(NH2)]Br”
Inorganics 4 (2016) 41.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
„Three Solid Modifications of Ba[Ga(NH2)4]2: A Soluble Intermediate in Ammonothermal GaN Crystal Growth”
Eur. J. Inorg. Chem. (2017) 902.

 H. Cao, C. Pistidda, T. M. M. Richter, A. Santoru, C. Milanese, S. Garroni, J. Bednarcik, A.-L. Chaudhary, G. Gizer, H.-P. Liermann, R. Niewa, P. Chen, T. Klassen, M. Dornheim,
„In situ X-ray diffraction study of the super-fast re-hydrogenation of K2[Zn(NH2)4]-8LiH”
J. Phys. Chem. C 121 (2017) 1546.

 H. Cao, J. Guo, F. Chang, C. Pistidda, W. Zhou, X. Zhang, A. Santoru, H. Wu, N. Schell, R. Niewa, P. Chen, T. Klassen, M. Dornheim,
„Transition and Alkali Metal Complex Ternary Amides for Ammonia Synthesis and Decomposition”
Chem. Eur. J. 23 (2017) 9766.

 J. Hertrampf, E. Schlücker, D. Gudat, R. Niewa,
„Dissolved Intermediates in Ammonothermal Crystal Growth: Stepwise Condensation of [Ga(NH2)4]− towards Ga”
Cryst. Growth & Design 17 (2017) 4855.

Talks:

 R. Niewa, S. Zhang, T. Richter,
„Chemistry of Ammonothermal Nitride Growth”,
21st Annual Conference of the German Crystallographic Society, 19 - 22 März 2013, Freiberg, Deutschland.

 S. Zhang, R. Niewa (Keynote-Vortrag),
Intermediates during Ammonothermal Crystal Growth of GaN”,
8th International Workshop on Bulk Nitride Semiconductors IWBNS-VIII, 30. September – 5. Oktober 2013, Kloster Seeon, Deutschland.

 S. Zhang, T. M. M. Richter, J. Hertrampf, N. S. U. Alt, E. Schlücker, R. Niewa (eingeladener Vortrag),
"Chemistry of Ammonothermal Nitride Crystal Growth”,
European Materials Research Society Spring 2014, 27. - 29. Mai 2014, Lille, Frankreich.

 S. Schimmel, M. Lindner, T. G. Steigerwald, B. Hertweck, T. M. M. Richter,
U. Künecke, N. S. A. Alt, R. Niewa, E. Schlücker, P. J. Wellmann,
“In Situ X-Ray Imaging of GaN under Ammonothermal Conditions – Application for GaN Solubility Measurements”,
DKT 2015 15. Kristallzüchtungstagung,  4. – 6. März 2015, Goethe-Universität Frankfurt am Main, Germany.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
“Trigonal bipyramidal coordination of Zn2+ in Zn(NH3)2F2 and Zn(NH3)3F2”,
23. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK),  16. – 19. März 2015, Georg-August Universität Göttingen, Germany.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
“SrBa2(NH2)6: A new ternary amide from ammonothermal synthesis”,
23. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK),  16. – 19. März 2015, Georg-August Universität Göttingen, Germany.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
“Three Modifications of Barium Tetramidogallate: An Intermediate in Ammonothermal GaN Crystal Growth”,
ECSSC 15, 15th European Conference on Solid State Chemistry, 23. – 26. August 2015, Universität Wien, Austria.

 T. M. M. Richter, J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa, (invited scene setter talk)
“Ammonothermal Nitride-Semiconductor Crystal Growth from a Chemist’s Perspective”,
IWBNS-IX, 9th International Workshop on Bulk Nitride Semiconductors, 2. – 6. November 2015, Oak Valley, Wonju, South-Korea.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
“Ammonothermal Synthesis and Crystal Growth of Indium Nitride”,
24. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK), 14. – 17. März 2016, Universität Stuttgart, Germany.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
“Subsequent condensation in [Zn2(NH3)2(NH2)3]Cl and [Zn(NH3)2(NH2)]Br: towards ammonothermal crystal growth of Zn3N2”,
24. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK), 14. – 17. März 2016, Universität Stuttgart, Germany.

 R. Niewa, J. Hertrampf, T. M. M. Richter, N. S. A. Alt, E. Schlücker, (invited talk)
“Chemistry of Ammonothermal Semiconductor Crystal Growth”,
GCCCG-1/DKT 2016, Deutsche Kristallzüchtungstagung, 16. – 18. März 2016, Dresden, Germany.

 R. Niewa,
“Chemistry in prototropic solvent ammonia”,
1st ammonothermal Summerschool, 16. – 23. Juli 2016, Friedrich-Alexander-Universität Erlangen, Germany.

 J. Hertrampf, P. Becker, N. S. A. Alt, E. Schlücker, R. Niewa, (Late News talk)
“Ammonothermal Synthesis and Crystal Growth of Indium Nitride”,
IWN 2016, International Workshop on Nitride Semiconductors, 2. – 7. Oktober 2016, Orlando, Florida, USA.

 R. Niewa, J. Hertrampf, T. M. M. Richter, N. S. A. Alt, E. Schlücker, (invited Vortrag)
“Chemistry of the Ammonothermal Method for Growth of Nitrides as GaN, InN and Zn3N2”,
IWN 2016, International Workshop on Nitride Semiconductors, 2. – 7. Oktober 2016, Orlando, Florida, USA.

Poster:

 S. Zhang, R. Niewa,
„Possible Intermediates during Ammonothermal Synthesis of GaN”,
ECSSCXIII, 13th European Conference on Solid State Chemistry, 25. – 28. September 2011, Lunds Universitet, Schweden.

 S. Zhang, R. Niewa,
„Synthesis and Crystal Structures of Novel Gallium Amides and Amines”,
20. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK), 12. – 15. März 2012, LMU München, Deutschland.

 S. Zhang, R. Niewa,
„Intermediates during Ammono-basic Crystal Growth of GaN”,
21st Annual Conference of the German Crystallographic Society, 19 - 22 März 2013, Freiberg, Germany.

 T. Richter, S. Zhang, R. Niewa,
„Ammonothermal Synthesis of a New Modification of K2[Zn(NH2)4]”,
21st Annual Conference of the German Crystallographic Society, 19 - 22 März 2013, Freiberg, Germany.

 J. Hertrampf, S. Zhang, N. S. A. Alt, E. Schlücker, R. Niewa,
“Alkaline-Earth Metal Amides as Mineralizers for Ammonothermal GaN Crystal Growth: Ba[Ga(NH2)4]2 as Intermediate”,
23. Jahrestagung der Deutschen Kristallographischen Gesellschaft, 16.–19. März 2014, Berlin, Germany.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
“Ammonothermal Synthesis of Li4[Zn(NH2)4](NH2)2 and Cs2[Zn(NH2)4]”,
GDCH Fachgruppentagung Festkörperchemie,  15.-17. September 2014, Dresden, Germany.

 S. Schimmel, M. Lindner, T. G. Steigerwald, B. Hertweck, T. M. M. Richter, U. Künecke, N. S. A. Alt, R. Niewa, E. Schlücker, P. J. Wellmann,
“In Situ X-Ray Imaging of GaN under Ammonothermal Conditions – Application for GaN Solubility Measurements”,
DKT 2015 15. Kristallzüchtungstagung,  4. – 6. März 2015, Goethe-Universität Frankfurt am Main, Germany.

 S. Schimmel, M. Lindner, T. G. Steigerwald, B. Hertweck, T. M. M. Richter, U. Künecke, N. S. A. Alt, R. Niewa, E. Schlücker, P. J. Wellmann,
“In Situ X-Ray Imaging of GaN under Ammonothermal Conditions – Application for GaN Solubility Measurements”,
DKT 2015 15. Kristallzüchtungstagung,  4. – 6. März 2015, Goethe-Universität Frankfurt am Main, Germany.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa 
„Trigonal bipyramidal coordination of Zn2+ in Zn(NH3)2F2 and Zn(NH3)3F2”
23. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK), 16. – 19. März 2015, Georg-August Universität Göttingen, Deutschland.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa
„Three Modifications of Barium Tetramidogallate: An Intermediate in Ammonothermal GaN Crystal Growth”
ECSSC 15, 15th European Conference on Solid State Chemistry, 23. – 26. August 2015, Universität Wien, Österreich.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa
„Ammonothermal Synthesis and Crystal Growth of Indium Nitride”
24. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK), 14. – 17. März 2016, Universität Stuttgart, Deutschland.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa
„Subsequent condensation in [Zn2(NH3)2(NH2)3]Cl and [Zn(NH3)2(NH2)]Br: towards ammonothermal crystal growth of Zn3N2”
24. Jahrestagung der Deutschen Gesellschaft für Kristallographie (DGK), 14. – 17. März 2016, Universität Stuttgart, Deutschland.

 H. Cao, C. Pistidda, T. M.M. Richter, R. Niewa, P. Chen, T. Klassen, M. Dornheim
„Ternary Transition Metals Amides for Hydrogen Storage:Cases Study with Alkali Metal Amidozincates”
MH2016, 15th International Symposium on Metal-Hydrogen Systems, 7. – 12. August 2016, Interlaken, Schweiz.


Subproject 3

Publications:

 N. S. A. Alt, E. Schlücker,
"Hochdrucksichtzelle für Untersuchungen des ammonothermalen Prozesses",
Chemie Ingenieur Technik 83 (2010) 280-285.

 N. S. A. Alt, E. Meissner, E. Schluecker,
"Development of a novel in situ monitoring technology for ammonothermal reactors",
Journal of Crystal Growth 350 (2011) 2-4.

 N. S. A. Alt, E. Meissner, E. Schluecker, L. Frey,
"In situ monitoring technologies for ammonothermal reactors",
PSS (C) 9 (2012) 436-439.

 B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
"Corrosive Degeneration of Autoclaves for the Ammonothermal Synthesis: Experimental Approach and First Results",
Chemical Engineering & Technology, in press (DOI: 10.1002/ceat.201300719).

 T. G. Steigerwald, N. S. A. Alt, B. Hertweck, E. Schluecker,
"Feasibility of density and viscosity measurements under ammonothermal conditions";
Journal of Crystal Growth 403 (2014) 59 (DOI: 10.1016/j.jcrysgro.2014.06.013).

 S. Zhang, N.S.A. Alt, E. Schlücker and R. Niewa
„Novel Alkali Metal Amidogallates as Intermediates in Ammonothermal GaN Crystal Growth”,
J. Cryst. Growth 403 (2014), 22 (DOI: 10.1016/j.jcrysgro.2014.06.015).

 B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
"Different corrosion behaviour of autoclaves made of nickel base alloy 718 in ammonobasic and ammonoacidic environments",
Journal of Supercritical Fluids 95 (2014) 158 (DOI: 10.1016/j.supflu.2014.08.006).

 B. Hertweck, S. Zhang, T. G. Steigerwald, N. S. A. Alt, R. Niewa, E. Schluecker,
"Applicability of metals as liner materials for the ammonoacidic crystal growth",
Chemical Engineering & Technology 37 (2014) 11, DOI: 10.1002/ceat.201400414.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
"SrBa2(NH2)6: A new ternary amide from ammonothermal synthesis",
Z. Anorg. Allg. Chem. 641 (2015) 234.

 S. Schimmel, M. Lindner, T. G. Steigerwald, B. Hertweck, T. M. M. Richter, U. Künecke, N. S. A. Alt, R. Niewa, E. Schlücker, P. Wellmann,
"Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution",
J. Cryst. Growth 418 (2015) 64.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Ammonothermal synthesis and characterization of Li4[Zn(NH2)4](NH2)2",
Z. Anorg. Allg. Chem. 641 (2015) 1016.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
"SrBa2(NH2)6: A new ternary amide from ammonothermal synthesis",
Z. Kristallogr. Suppl. 35 (2015) 80.

 T. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Trigonal bipyramidal coordination of Zn2+ in Zn(NH3)2F2 and Zn(NH3)3F2",
Z. Kristallogr. Suppl. 35 (2015) 135.

 T. M. M. Richter, S. Le Tonquesse, N. S. A. Alt, E. Schlücker, R. Niewa,
"Trigonal-Bipyramidal Coordination in First Ammoniates of ZnF2: ZnF2(NH3)3 and ZnF2(NH3)2",
Inorg. Chem. 55 (2016) 2488.

 J. Hertrampf, N. Alt, E. Schlücker, R. Niewa,
"Ammonothermal Synthesis and Crystal Growth of Indium Nitride",
Z. Kristallogr. Suppl. 36 (2016) 73.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Subsequent condensation in [Zn2(NH3)2(NH2)3]Cl and [Zn(NH3)2(NH2)]Br: towards ammonothermal crystal growth of Zn3N2",
Z. Kristallogr. Suppl. 36 (2016) 90.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
"Ammonothermal Synthesis and Characterization of Cs2[Zn(NH2)4]",
Z. Anorg. Allg. Chem. 642 (2016) 1207.

 J. Hertrampf, N. S. A. Alt, E. Schlücker, M. Knetzger, E. Meissner, R. Niewa,
„Ammonothermal synthesis of GaN using Ba(NH2)2 as mineralizer”
J. Cryst. Growth 456 (2016) 2-4 (doi:10.1016/j.jcrysgro.2016.08.024).

 T. M. M. Richter, S. Strobel, N. S. A. Alt, E. Schlücker, R. Niewa,
„Ammonothermal synthesis and crystal structures of diamminetriamidodizinc chloride [Zn2(NH3)2(NH2)3]Cl and diamminemonoamidozinc bromide [Zn(NH3)2(NH2)]Br”
Inorganics 4 (2016) 41.

 S. Schimmel, U. Künecke, M. Meisel, B. Hertweck, T. G. Steigerwald, C. Nebel, N. S.A. Alt, E. Schlücker, and P. Wellmann,
“Chemical stability of carbon-based inorganic materials for in situ x-ray investigations of ammonothermal crystal growth of nitrides”,
J. Crystal Growth 456 (2016) 33-42 (DOI: 10.1016/j.jcrysgro.2016.08.067)

 J. Hertrampf, N. S. A. Alt, E. Schlücker, R. Niewa,
„Three Solid Modifications of Ba[Ga(NH2)4]2: A Soluble Intermediate in Ammonothermal GaN Crystal Growth”
Eur. J. Inorg. Chem. (2017) 902.

 J. Hertrampf, E. Schlücker, D. Gudat, R. Niewa,
„Dissolved Intermediates in Ammonothermal Crystal Growth: Stepwise Condensation of [Ga(NH2)4]− towards Ga”
Cryst. Growth & Design 17 (2017) 4855.

 S. Schimmel, M. Koch, P. Macher, A.-C. L. Kimmel, T. G. Steigerwald, N. S.A. Alt, E. Schlücker and P. Wellmann
“Solubility and dissolution kinetics of GaN in supercritical ammonia in presence of ammonoacidic and ammonobasic mineralizers”,
J. Cryst. Growth 479 (2017) 59-66 (DOI: 10.1016/j.jcrysgro.2017.09.027)

 H. Baser, T.G. Steigerwald, D. Freitag, W. Schwieger, E. Schlücker,
“Solubility studies of sodium azide in liquid ammonia by in situ ultrasonic velocity measurement”,
Chem. Eng. Tech. 40 (2017) 6, (DOI: 10.1002/ceat.201700146)

 Thomas G. Steigerwald, Johannes Balouschek, Benjamin Hertweck, Anna-Carina L. Kimmel, Nicolas S.A. Alt, Eberhard Schluecker
„In situ investigation of decomposing ammonia and ammonobasic solutions under supercritical conditions via UV/vis and Raman Spectroscopy“
J. Supercrit. Fluids (accepted)

Talks:

 Saskia Schimmel, Ulrike Künecke, Hasan Baser, Thomas Steigerwald, Benjamin Hertweck, Nicolas Alt, Eberhard Schlücker, Wilhelm Schwieger, Peter Wellmann,
"Towards x-ray in situ visualization of ammonothermal crystal growth of nitrides via hydrothermal crystallization of zeolites",
E-MRS 2013 FALL MEETING, 16. - 20. September 2013, Warschau, Polen.

 T. G. Steigerwald, N. S. A. Alt, B. Hertweck, E. Schlücker,
"Challenges in the in situ Measuring of Thermodynamic Properties in the Ammonothermal Process"
International Symposium on High Pressure Process Technologies, September 2013, Belgrad, Serbien.

 Nicolas S. A. Alt; Thomas G. Steigerwald; Benjamin Hertweck; Eberhard Schluecker,
"Demonstration of Feasibility for in situ Measurments of Thermodynamic Properties in the Ammonothermal Process",
IWBNS-VIII, 8th International Workshop on Bulk Nitride Semiconductors, 30. September – 5. October 2013, Kloster Seeon, Deutschland.

 S. Zhang, T. M. M. Richter, J. Hertrampf, N. S. U. Alt, E. Schlücker, R. Niewa (eingeladener Vortrag),
"Chemistry of Ammonothermal Nitride Crystal Growth”,
European Materials Research Society Spring 2014, 27. - 29. Mai 2014, Lille, Frankreich.

 T. G. Steigerwald, B. Hertweck, N. S. A. Alt, E. Schluecker,
"Towards solubility studies in ammonothermal systems",
ISHA 2014, 4th International Solvothermal and Hydrothermal Association Conference, 26. - 29. Oktober 2014, Bordeaux, Frankreich.

 B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
"Corrosion resistance of different superalloys in ammonoacidic environment",
ISHA 2014, 4th International Solvothermal and Hydrothermal Association Conference, 26. - 29. Oktober 2014, Bordeaux, Frankreich.

 A.-C. L. Kimmel, B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
“Applicability and Corrosion Behavior of Different Nickel and Cobalt Based Superalloys in Ammonoacidic Crystal Growth Process“,
IWBNS-IX, Hansol Oak Valley, Wonju, Korea, 2015

 T. G. Steigerwald, A.-C. L. Kimmel, N. S. A. Alt, E. Schluecker,
“Measuring Fluid Properties, such as Solubility and Viscosity, of the Ammonothermal Process“,
IWBNS-IX, Hansol Oak Valley, Wonju, Korea, 2015

 A.-C. L. Kimmel, B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker
„Corrosion Behaviour of Nickel and Cobalt Based Super Alloys in Supercritical Ammonia Containing Acidic Mineralizers NH4F or NH4Cl”,
15th EMSF, Essen, Germany 2016

 T. G. Steigerwald, A.-C. L. Kimmel, B. Hertweck, N. S. A. Alt, Eberhard Schluecker
„Solubility Studies of Gallium Nitride in Supercritical Ammonia Containing NH4F”,
15th EMSF, Essen, Germany 2016

 A.-C. L. Kimmel, B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker
„Influence of different autoclave setups on ammonothermal experiments“ IWBNS-X, Nuuksio National Park, Helsinki, Finland, 2017

 T. G. Steigerwald, A.-C. L. Kimmel, E. Schluecker
„In situ analysis of ammonothermal media by UVVis and Raman Spectroscopy“
10th WCCE, Barcelona, Spain, 2017

Poster:

J. Erlekampf, E. Meissner, J. Seebeck, N. S. A. Alt, J. Friedrich, E. Schlücker, L. Frey,
"Thermal model and experimental validation of the temperature distribution by in-situ temperature measurements under ammonothermal conditions",
IWN 2012, International Workshop on Nitride Semiconductors, Sapporo, Japan.

 J. Hertrampf, S. Zhang, N. S. A. Alt, E. Schlücker, R. Niewa,
“Alkaline-Earth Metal Amides as Mineralizers for Ammonothermal GaN Crystal Growth: Ba[Ga(NH2)4]2 as Intermediate”,
23. Jahrestagung der Deutschen Kristallographischen Gesellschaft, 16.–19. März 2014, Berlin, Germany.

 T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
“Ammonothermal Synthesis of Li4[Zn(NH2)4](NH2)2 and Cs2[Zn(NH2)4]”,
GDCH Fachgruppentagung Festkörperchemie,  15.-17. September 2014, Dresden, Germany.

 B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
"On the implementation of autoclaves for the ammonothermal synthesis with improved corrosion resistance",
Materials Science and Engineering, 23. - 25. September 2014, Darmstadt, Deutschland.

 

Subproject 4

Publications:

H. Baser, T.G. Steigerwald, D. Freitag, W. Schwieger, E. Schlücker,
“Solubility studies of sodium azide in liquid ammonia by in situ ultrasonic velocity measurement”,
Chem. Eng. Tech. 2017, 40, No. 6, 1101–1106

Talks:

Saskia Schimmel, Ulrike Künecke, Hasan Baser, Thomas Steigerwald, Benjamin Hertweck, Nicolas Alt, Eberhard Schlücker, Wilhelm Schwieger, Peter Wellmann,
"Towards x-ray in situ visualization of ammonothermal crystal growth of nitrides via hydrothermal crystallization of zeolites",
E-MRS 2013 FALL MEETING, 16. - 20. September 2013, Warschau, Polen.

Poster:

H. Baser, W. Schwieger, P. J. Wellmann, U. Künecke, S. Schimmel,
"Synthesis and in situ digital X-ray imaging of the crystal growth of giant zeolite crystals by bulk material dissolution technique",
25. Deutsche Zeolith-Tagung, 06. -08. März 2013, Hamburg, Deutschland.


Subproject 5

Publications:

 S. Schimmel, U. Künecke, H. Baser, T. G. Steigerwald, B. Hertweck, N. S. A. Alt, E. Schlücker, W. Schwieger, P. Wellmann,
"Towards x-ray in-situ visualization of ammonothermal crystal growth of nitrides",
Physica Status Solidi C 11 (2014) 1439 (DOI: 10.1002/pssc.201300656).

 S. Schimmel, M. Lindner, T.G. Steigerwald, B. Hertweck, T.M.M. Richter, U. Künecke, N.S.A. Alt, R. Niewa, E. Schlücker, and P. J. Wellmann
“Determination of GaN solubility in supercritical ammonia with NH4F and NH4 Cl mineralizer by in situ x-ray imaging of crystal dissolution”,
J. Crystal Growth 418 (2015) 64-69  (DOI: 10.1016/j.jcrysgro.2015.02.020)

 B. Hertweck, S. Schimmel, T. G. Steigerwald, N.S.A. Alt, P. J. Wellmann, and E. Schluecker
“Ceramic liner technology for ammonoacidic synthesis”
J. of Supercritical Fluids, 99 (2015) 76-87 (DOI: 10.1016/j.supflu.2015.01.017)

 S. Schimmel, U. Künecke, M. Meisel, B. Hertweck, T. G. Steigerwald, C. Nebel, N. S.A. Alt, E. Schlücker, and P. Wellmann,
“Chemical stability of carbon-based inorganic materials for in situ x-ray investigations of ammonothermal crystal growth of nitrides”,
J. Crystal Growth 456 (2016) 33-42 (DOI: 10.1016/j.jcrysgro.2016.08.067)

 J. Häusler, S. Schimmel, P. Wellmann, W. Schnick
“Ammonothermal Synthesis of Earth-Abundant Nitride Semiconductors ZnSiN2 and ZnGeN2 and Dissolution Monitoring by In Situ X-ray Imaging”,
Chem. Eur. J. 23 (2017) 1-9 (DOI: 10.1002/chem.201701081)

 S. Schimmel, M. Koch, P. Macher, A.-C. L. Kimmel, T. G. Steigerwald, N. S.A. Alt, E. Schlücker and P. Wellmann
“Solubility and dissolution kinetics of GaN in supercritical ammonia in presence of ammonoacidic and ammonobasic mineralizers”,
J. Cryst. Growth 479 (2017) 59-66 (DOI: 10.1016/j.jcrysgro.2017.09.027)

Talks:

 S. Schimmel, U. Künecke, H. Baser, T. G. Steigerwald, B. Hertweck, N. S. A. Alt, E. Schlücker, W. Schwieger, P. Wellmann,
"Towards x-ray in situ visualization of ammonothermal crystal growth of nitrides via hydrothermal crystallization of zeolites",
E-MRS 2013 FALL MEETING, 16. - 20. September 2013, Warschau, Polen.

 J. Erlekampf, E. Meissner, N. S. A. Alt, J. Seebeck, U. Künecke, S. Schimmel, E. Schlücker, P. Wellmann, J. Friedrich, L. Frey,
In-situ Einblicke in die Ammonothermalsynthese,
14. Jahrestagung des Fraunhofer IISB, 6. Dezember 2012, Fraunhofer IISB, Erlangen, Deutschland.

 S. Schimmel, M. Lindner, T. G. Steigerwald, B. Hertweck, T. M. M. Richter, U. Künecke, N. S. A. Alt, R. Niewa, E. Schlücker, and P. J. Wellmann
“In Situ X-Ray Imaging of GaN under Ammonothermal Conditions Application for GaN Solubility Measurements”,
GermanConference on Crystal Growth (DKT2015), March 4-6, 2015, Frankfurt am Main, Germany

 S. Schimmel, M. Koch, T. G. Steigerwald, A.-C. L. Kimmel, N. S. A. Alt, E. Schlücker, and P. J. Wellmann
“Solubility and dissolution kinetics of GaN under ammonobasic conditions using NaN3 mineralizer”,
1st German Czechoslovak Conference on Crystal Growth, March 16-18, 2016, Dresden, Germany

 S. Schimmel, M. Koch, P. Macher, T. G. Steigerwald, A.-C.L. Kimmel, N. S. A. Alt, E. Schlücker, and P. J. Wellmann
“GaN Solubility and Dissolution Kinetics Investigated Using Direct Insight into Ammonothermal Autoclaves by In Situ X-Ray Imaging”,
International Workshop on Nitride Semiconductors, October 2-7, 2016, Orlando, USA

 S. Schimmel, M. Koch, P. Macher, T. G.Steigerwald, A.-C. L. Kimmel, N. S. A. Alt, E. Schlücker and P. J. Wellmann
“Towards Improved Understanding of Ammonothermal Crystal Growth - Insights by In Situ X-ray Imaging of GaN Dissolution”,
DGKK Workshop on bulk semiconductor crystals, October 12-13, 2016, Erlangen, Germany

 S. Schimmel, D. Zevgitis, M. Koch, P. Macher, T. G. Steigerwald, A.-C. L. Kimmel, E. Schlücker, and P. Wellmann
“Insights into the ammonothermal growth process of GaN by in situ x-ray visualization”,
International Workshop on Bulk Nitride Semiconductors, September, 18-22, 2017, Nuuksio National Park, Espoo, Finland

 S. Schimmel, A.-C.L. Kimmel, T. G. Steigerwald, E. Schlücker, and P. J. Wellmann
“Insights into ammonothermal growth of nitrides by in situ measurement techniques”,
DGKK Workshop on bulk semiconductor crystals, October 11-12, 2017, Freiberg, Germany

Poster:

H. Baser, W. Schwieger, P. J. Wellmann, U. Künecke, S. Schimmel,
"Synthesis and in situ digital X-ray imaging of the crystal growth of giant zeolite crystals by bulk material dissolution technique",
25. Deutsche Zeolith-Tagung, 06. - 08. März 2013, Hamburg, Deutschland.

 S. Schimmel, U. Künecke, T. Steigerwald, B. Hertweck, N. S. A. Alt, E. Schlücker, P. Wellmann,
"In situ Visualisierung von GaN-Kristallen in ammonothermalen Hochdruck-Autoklaven mittels Röntgenabbildung",
Deutsche Kristallzüchtungstagung DKT-2014, 12. - 14. März 2014, Halle (Saale), Deutschland.

 S. Schimmel, M. Meisel, B. Hertweck, T. G. Steigerwald, C. Nebel, N. S. A. Alt, E. Schlücker and Peter Wellmann
“Chemical stability of carbon-based inorganic construction materials for in situ x-ray measurements of ammonothermal crystal growth of nitrides”,
5th German-Swiss Conference on Crystal Growth, March 08 10, 2017, Freiburg, Germany

 

Subproject 6

Publications:

 N. S. A. Alt, E. Meissner, E. Schluecker,
“Development of a novel in situ monitoring technology for ammonothermal reactors”,
Journal of Crystal Growth 350 (2012) 2 (DOI: 10.1016/j.jcrysgro.2011.12.012).

 N. S. A. Alt, E. Meissner, E. Schluecker, L. Frey,
“In situ monitoring technologies for ammonothermal reactors”,
PSS (C) 9 (2012) 436 (DOI: 10.1002/pssc.201100361).

 J. Erlekampf, J. Seebeck, P. Savva, E. Meissner, J. Friedrich, N.S. Alt, E. Schlücker, L. Frey,
“Numerical time-dependent 3D simulation of flow pattern and heat distribution in an ammonothermal system with various baffle shapes”,
Journal of Crystal Growth 403 (2014) 96 (DOI: 10.1016/j.jcrysgro.2014.06.007).

Talks:

 E. Meissner (invited),
“Development and experimental validation of a thermal model for the ammonothermal reactor and possibilities for insitu insight into the ammonothermal growth process”,
Intensive discussion on Growth of Nitride Semiconductors, 22. - 23. Oktober 2012, Tohoku University, Sendai, Japan.

 E. Meissner (invited),
“Development of means for in-situ insight into the ammonothermal growth process and experimental validation”,
Seminar, Polish Academy of Science, November 2012, Warschau, Polen.

 J. Erlekampf, E. Meissner, N. S. A. Alt, J. Seebeck, U. Künecke, S. Schimmel, E. Schlücker, P. Wellmann, J. Friedrich, L. Frey,
„In-situ Einblicke in die Ammonothermalsynthese“,
14. Jahrestagung des Fraunhofer IISB, 6. Dezember 2012, Fraunhofer IISB, Erlangen, Deutschland.

 J. Erlekampf, E. Meissner, J. Seebeck, A. K. Ghanta, J. Friedrich, L. Frey,
“Development of a 3D numerical model for the study of convection pattern in an ammonothermal system”,
DKT-2013, Deutsche Kristallzüchtungstagung, 6. – 8. März 2013, Erlangen, Deutschland.

 J. Erlekampf, E. Meissner, J. Seebeck, P. Savva, J. Friedrich, L. Frey (invited),
“Local numerical 3D simulations of an ammonothermal crystal growth process based on global thermal 2D calculations”,
IWBNS-VIII, 8th International Workshop on Bulk Nitride Semiconductors, 30. September - 5. Oktober 2013, Kloster Seeon, Deutschland.

 J. Erlekampf, P. Savva, J. Seebeck, E. Meissner, J. Friedrich, L. Frey,
“Numerical time-dependent 3D simulation of flow pattern and heat distribution in an ammonothermal system”,
ISHA 2014, 4th International Solvothermal and Hydrothermal Association Conference, 26.-29. Oktober 2014, Bordeaux, Frankreich.

Poster:

J. Erlekampf, E. Meissner, J. Seebeck, N. S. A. Alt, J. Friedrich, E. Schlücker, L. Frey,
“Thermal model and experimental validation of the temperature distribution by in-situ temperature measurements under ammonothermal conditions”,
IWN 2012, International Workshop on Nitride Semiconductors, 14.-19. Oktober 2012, Sapporo, Japan.

J. Erlekampf, E. Meissner, J. Seebeck, A. K. Ghanta, J. Friedrich, L. Frey,
“Evaluation of different baffle geometries in an ammonothermal system by a local numerical 3D model”,

ICCGE-17, 17th International Conference on Crystal Growth and Epitaxy, 11.–16. August 2013, Warschau, Polen.

J. Erlekampf, P. Savva, J. Seebeck, E. Meissner, J. Friedrich, L. Frey,
“Numerical view on the relevance of the baffle design in an ammonothermal system”,
IWN 2014, International Workshop on Nitride Semiconductors, 24.-29. August 2014, Breslau, Polen.

 J. Seebeck, J. Erlekampf, E. Meissner, P. Savva, J. Friedrich, L. Frey,
“Modeling of mineralizer-mediated species transport in an ammonothermal system”,
ISHA 2014, 4th International Solvothermal and Hydrothermal Association Conference, 26.-29. Oktober 2014, Bordeaux, Frankreich.

 

Subproject Z

Publications:

B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
"Corrosive Degeneration of Autoclaves for the Ammonothermal Synthesis: Experimental Approach and First Results",
Chemical Engineering & Technology, 37 (2014) 1903–1906. doi:10.1002/ceat.201300719.

T. G. Steigerwald, N. S. A. Alt, B. Hertweck, E. Schluecker,
"Feasibility of density and viscosity measurements under ammonothermal conditions";
Journal of Crystal Growth, 403 (2014) 59 (DOI: 10.1016/j.jcrysgro.2014.06.013).

S. Zhang, N.S.A. Alt, E. Schlücker and R. Niewa
„Novel Alkali Metal Amidogallates as Intermediates in Ammonothermal GaN Crystal Growth”,
J. Cryst. Growth 403 (2014), 22 (DOI: 10.1016/j.jcrysgro.2014.06.015).

B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
"Different corrosion behaviour of autoclaves made of nickel base alloy 718 in ammonobasic and ammonoacidic environments",
Journal of Supercritical Fluids 95 (2014) 158 (DOI: 10.1016/j.supflu.2014.08.006).

B. Hertweck, S. Zhang, T. G. Steigerwald, N. S. A. Alt, R. Niewa, E. Schluecker,
"Applicability of metals as liner materials for the ammonoacidic crystal growth",
Chemical Engineering & Technology, 37 (2014) 1835–1844. doi:10.1002/ceat.201400414.

B. Hertweck, S. Schimmel, T.G. Steigerwald, N.S.A. Alt, P.J. Wellmann, E. Schluecker,
“Ceramic liner technology for ammonoacidic synthesis”,
J. Supercrit. Fluids. 99 (2015) 76–87. doi:10.1016/j.supflu.2015.01.017.

S. Schimmel, M. Lindner, T.G. Steigerwald, B. Hertweck, T.M.M. Richter, U. Künecke, N.S.A. Alt, R. Niewa, E. Schlücker, P.J. Wellmann,
"Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution”,
J. Cryst. Growth. 418 (2015) 64–69. doi:10.1016/j.jcrysgro.2015.02.020.

J. Häusler, L. Neudert, M. Mallmann, R. Niklaus, A.C.L. Kimmel, N.S.A. Alt, E. Schlücker, O. Oeckler, W. Schnick,
“Ammonothermal Synthesis of Novel Nitrides: Case Study on CaGaSiN3”,
Chem. - A Eur. J. 23 (2017) 2583–2590. doi:10.1002/chem.201605344.

S. Schimmel, M. Koch, P. Macher, A.C.L. Kimmel, T.G. Steigerwald, N.S.A. Alt, E. Schlücker, P. Wellmann,
“Solubility and dissolution kinetics of GaN in supercritical ammonia in presence of ammonoacidic and ammonobasic mineralizers”,
J. Cryst. Growth. 479 (2017) 59–66. doi:10.1016/j.jcrysgro.2017.09.027.

Thomas G. Steigerwald, Johannes Balouschek, Benjamin Hertweck, Anna-Carina L. Kimmel, Nicolas S.A. Alt, Eberhard Schluecker
„In situ investigation of decomposing ammonia and ammonobasic solutions under supercritical conditions via UV/vis and Raman Spectroscopy“
J. Supercrit. Fluids (accepted)

Talks:

S. Schimmel, U. Künecke, H. Baser, T. G. Steigerwald, B. Hertweck, N. S. A. Alt, E. Schlücker, W. Schwieger, P. Wellmann,
"Towards x-ray in situ visualization of ammonothermal crystal growth of nitrides via hydrothermal crystallization of zeolites",
E-MRS 2013 FALL MEETING, 16.-20. September 2013, Warschau, Polen.

B. Hertweck, T. G. Steigerwald, M. Soell, N.S. A. Alt, E. Schluecker,
"A Method for Analyzing the Corrosion Behavior of Alloy 718 under Ammonothermal Conditions",
International Symposium on High Pressure Process Technologies, September 2013, Belgrad, Serbien.

N. S. A. Alt, T. G. Steigerwald, B. Hertweck, E. Schluecker,
"Demonstration of Feasibility for in situ Measurments of Thermodynamic Properties in the Ammonothermal Process",
IWBNS-VIII, 8th International Workshop on Bulk Nitride Semiconductors, 30. September – 5. October 2013, Kloster Seeon, Deutschland.

S. Zhang, T. M. M. Richter, J. Hertrampf, N. S. U. Alt, E. Schlücker, R. Niewa (eingeladener Vortrag),
"Chemistry of Ammonothermal Nitride Crystal Growth”,
European Materials Research Society Spring 2014, 27. - 29. Mai 2014, Lille, Frankreich.

T. G. Steigerwald, B. Hertweck, N. S. A. Alt, E. Schluecker,
"Towards the solubility studies in ammonothermal systems",
ISHA 2014, 4th International Solvothermal and Hydrothermal Association Conference, 26.-29. Oktober 2014, Bordeaux, Frankreich.

B. Hertweck, T. G. Steigerwald, A.-C.L. Kimmel, N. S. A. Alt, E. Schluecker,
"Corrosion resistance of different superalloys in ammonoacidic environment",
ISHA 2014, 4th International Solvothermal and Hydrothermal Association Conference, 26.-29. Oktober 2014, Bordeaux, Frankreich.

A.-C. L. Kimmel, B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
“Applicability and Corrosion Behavior of Different Nickel and Cobalt Based Superalloys in Ammonoacidic Crystal Growth Process“,
IWBNS-IX, Hansol Oak Valley, Wonju, Korea, 2015

T. G. Steigerwald, A.-C. L. Kimmel, N. S. A. Alt, E. Schluecker,
“Measuring Fluid Properties, such as Solubility and Viscosity, of the Ammonothermal Process“,
IWBNS-IX, Hansol Oak Valley, Wonju, Korea, 2015

A.-C. L. Kimmel, B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker
„Corrosion Behaviour of Nickel and Cobalt Based Super Alloys in Supercritical Ammonia Containing Acidic Mineralizers NH4F or NH4Cl”,
15th EMSF, Essen, Germany 2016

T. G. Steigerwald, A.-C. L. Kimmel, B. Hertweck, N. S. A. Alt, Eberhard Schluecker
„Solubility Studies of Gallium Nitride in Supercritical Ammonia Containing NH4F”,
15th EMSF, Essen, Germany 2016

A.-C. L. Kimmel, B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker
„Influence of different autoclave setups on ammonothermal experiments“ IWBNS-X, Nuuksio National Park, Helsinki, Finland, 2017

T. G. Steigerwald, A.-C. L. Kimmel, E. Schluecker
„In situ analysis of ammonothermal media by UVVis and Raman Spectroscopy“
10th WCCE, Barcelona, Spain, 2017

Poster:

J. Hertrampf, S. Zhang, N. S. A. Alt, E. Schlücker, R. Niewa,
“Alkaline-Earth Metal Amides as Mineralizers for Ammonothermal GaN Crystal Growth: Ba[Ga(NH2)4]2 as Intermediate”,
23. Jahrestagung der Deutschen Kristallographischen Gesellschaft, 16.–19. März 2014, Berlin, Germany.

T. M. M. Richter, N. S. A. Alt, E. Schlücker, R. Niewa,
“Ammonothermal Synthesis of Li4[Zn(NH2)4](NH2)2 and Cs2[Zn(NH2)4]”,
GDCH Fachgruppentagung Festkörperchemie,  15.-17. September 2014, Dresden, Germany.

B. Hertweck, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
"On the implementation of autoclaves for the ammonothermal synthesis with improved corrosion resistance",
MSE 2014, 23.-25. September 2014, Darmstadt, Deutschland.

B. Hertweck, A.-C. L. Kimmel, T. G. Steigerwald, N. S. A. Alt, E. Schluecker,
„High-temperature corrosion of autoclave material under ammonothermal conditions“,
EFC Workshop, Dechema, Frankfurt, Germany 2015