Diamond anvil cell syntheses and compressibility studies of the spinel-structured gallium oxonitride |
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| Authors: | Carmen E. Zvoriste Leonid Dubrovinsky Stefanie A. Hering Hubert Huppertz Ralf Riedel |
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| Affiliation: | 1. Fachbereich Material- und Geowissenschaften, Technische Universit?t Darmstadt , D-64287, Darmstadt, Germany;2. Bayerisches Geoinstitut, Universit?t Bayreuth , D-95440, Bayreuth, Germany;3. Department Chemie und Biochemie , Ludwig-Maximilians-Universit?t München , D-81377, München, Germany;4. Institut für Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universit?t Innsbruck , A-6020, Innsbruck, Austria |
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| 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. |
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| Keywords: | gallium oxonitride high-pressure bulk modulus diamond anvil cell |
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