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Diamond anvil cell syntheses and compressibility studies of the spinel-structured gallium oxonitride

Zvoriste, Carmen E. and Dubrovinsky, Leonid and Hering, Stefanie A. and Huppertz, Hubert and Riedel, Ralf and Kinski, Isabel (2009):
Diamond anvil cell syntheses and compressibility studies of the spinel-structured gallium oxonitride.
In: High Pressure Research, 29 (3), Taylor & Francis, pp. 389-395, ISSN 0895-7959,
[Online-Edition: http://dx.doi.org/10.1080/08957950903159798],
[Article]

Abstract

The formation conditions of cubic spinel-structured gallium oxonitride have been investigated in situ under high-pressure/high-temperature conditions using a laser-heated diamond anvil cell. As starting materials, a mixture of the end members w-GaN/β-Ga2O3 in a molar ratio of 3:2 and a gallium oxonitride ceramic derived during pyrolysis from the metallo-organic precursor (Ga(OtBu)2NMe2)2 were used. In the mixture of the end members, spinel-structured gallium oxonitride starts crystallizing at a pressure of 3 GPa and at a temperature of about 1300 °C. The precursor-derived ceramic with predefined bondings reacted completely to the spinel phase, without by-products, at a pressure of 0.7 GPa. For the spinel-structured gallium oxonitride we determined a bulk modulus K of 216(7) GPa using a fixed value of 4 for K′. The spinel-structured gallium oxonitride exhibits a cell volume of 552.9(5) Å3 at ambient pressure.

Item Type: Article
Erschienen: 2009
Creators: Zvoriste, Carmen E. and Dubrovinsky, Leonid and Hering, Stefanie A. and Huppertz, Hubert and Riedel, Ralf and Kinski, Isabel
Title: Diamond anvil cell syntheses and compressibility studies of the spinel-structured gallium oxonitride
Language: English
Abstract:

The formation conditions of cubic spinel-structured gallium oxonitride have been investigated in situ under high-pressure/high-temperature conditions using a laser-heated diamond anvil cell. As starting materials, a mixture of the end members w-GaN/β-Ga2O3 in a molar ratio of 3:2 and a gallium oxonitride ceramic derived during pyrolysis from the metallo-organic precursor (Ga(OtBu)2NMe2)2 were used. In the mixture of the end members, spinel-structured gallium oxonitride starts crystallizing at a pressure of 3 GPa and at a temperature of about 1300 °C. The precursor-derived ceramic with predefined bondings reacted completely to the spinel phase, without by-products, at a pressure of 0.7 GPa. For the spinel-structured gallium oxonitride we determined a bulk modulus K of 216(7) GPa using a fixed value of 4 for K′. The spinel-structured gallium oxonitride exhibits a cell volume of 552.9(5) Å3 at ambient pressure.

Journal or Publication Title: High Pressure Research
Volume: 29
Number: 3
Publisher: Taylor & Francis
Uncontrolled Keywords: gallium oxonitride, high-pressure, bulk modulus, diamond anvil cell
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 13 Apr 2012 09:07
Official URL: http://dx.doi.org/10.1080/08957950903159798
Identification Number: doi:10.1080/08957950903159798
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