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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.

Sub-project 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.

Talks:

J. Häusler,
"Ammonothermalverfahren und Methathesereaktionen für die Synthese von binären und höheren Nitriden",
1. Obergurgl-Seminar für Festkörperchemie, 28. - 31.01.2014, Obergurgl, Austria.

Sub-project 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.

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.

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.

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), 29-78 (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., accepted for publication

Talks:

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

S. Zhang, R. Niewa (Keynote Lecture),
Intermediates during Ammonothermal Crystal Growth of GaN”,
8th International Workshop on Bulk Nitride Semiconductors IWBNS-VIII, October 2013, Kloster Seeon, Germany.

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

Posters:

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

S. Zhang, R. Niewa,
„Synthesis and Crystal Structures of Novel Gallium Amides and Amines”,
20st Annual Conference of the German Crystallographic Society March 2012, LMU München, Germany.

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

J. Hertrampf, S. Zhang, N. S. U. Alt, E. Schlücker, R. Niewa,
“Alkaline-Earth Metal Amides as Mineralizers for Ammonothermal GaN Crystal Growth: Ba[Ga(NH2)4]2 as Intermediate”,
23st Annual Conference of the German Crystallographic Society, March 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,  2014, September, Dresden, Germany.

Sub-project 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, accepted for publication.

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, Warsaw, Poland.

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, Belgrade, Serbia.

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, October 2013, Kloster Seeon, Germany.

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

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, October 2014, Bordeaux, France.

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, October 2014, Bordeaux, France.

Posters:

J. Hertrampf, S. Zhang, N. S. U. Alt, E. Schlücker, R. Niewa,
“Alkaline-Earth Metal Amides as Mineralizers for Ammonothermal GaN Crystal Growth: Ba[Ga(NH2)4]2 as Intermediate”,
23st Annual Conference of the German Crystallographic Society, March 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,  2014, September, 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, September 2014, Darmstadt, Germany.

Sub-project 4

Tagungsbeiträge (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.

Tagungsbeiträge (Vorträge):

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.

Sub-project 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).

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, September 2013, Warsaw University of Technology, Poland.

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, December 2012, Fraunhofer IISB, Erlangen, Germany.

Poster:

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, March 2014, Halle (Saale), Deutschland.

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, March 2013, Hamburg, Germany.

Sub-project 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. October 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, Warsaw, Poland.

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, Germany.

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. March 2013, FAU Erlangen-Nürnberg, Germany.

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. October 2013, Kloster Seeon, Germany.

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. October 2014, Bordeaux, France.

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. October 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, Warsaw, Poland.

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, Wrocław, Poland.

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. October 2014, Bordeaux, France.

Sub-project 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, 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, accepted for publication.

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, Warsaw, Poland.

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, Belgrade, Serbia.

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, Belgrade, Serbia.

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, October 2013, Kloster Seeon, Germany.

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

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, October 2014, Bordeaux, France.

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, October 2014, Bordeaux, France.

Poster:

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, September 2014, Darmstadt, Germany.