1. Diamond anvil cell syntheses and compressibility studies of the spinel-structured gallium oxonitride.
- Author
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Zvoriste, CarmenE., Dubrovinsky, Leonid, Hering, StefanieA., Huppertz, Hubert, Riedel, Ralf, and Kinski, Isabel
- Subjects
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CHEMICAL reactions , *GALLIUM , *PRESSURE , *SPINEL , *PROPERTIES of matter - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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