期刊
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
卷 5, 期 5-6, 页码 196-198出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201105189
关键词
magnesium silicon nitride; nitridosilicates; diamond anvil cell; high-pressure synthesis
资金
- ESRF (Grenoble, France)
A new phase of magnesium silicon nitride, beta-MgSiN2, is synthesized in a laser-heated diamond anvil cell at pressure of 27 GPa and temperatures exceeding 2000 K. It crystallises in a rhombohedral caswellsilverite-type structure (space group R (3) over barm) with both Mg and Si atoms in octahedral coordinations - in agreement with earlier DFT calculations. In contrast to recent shock compression investigation, the beta-phase is found to metastably persist at ambient conditions. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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