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High‐pressure high‐temperature synthesis and structure of β‐MgSiN 2
Author(s) -
Andrade Miria,
Dzivenko Dmytro,
Miehe Gerhard,
Boehler Reinhard,
Hintzen Hubertus T.,
Riedel Ralf
Publication year - 2011
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201105189
Subject(s) - crystallography , octahedron , nitride , diamond anvil cell , high pressure , phase (matter) , bar (unit) , silicon nitride , materials science , shock (circulatory) , crystal structure , ambient pressure , alloy , chemistry , silicon , thermodynamics , metallurgy , nanotechnology , physics , organic chemistry , layer (electronics) , meteorology , medicine
A new phase of magnesium silicon nitride, β‐MgSiN 2 , 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 \bar 3m) $ with both Mg and Si atoms in octahedral coordinations – in agreement with earlier DFT calculations. In contrast to recent shock compression investigation, the β‐phase is found to metastably persist at ambient conditions. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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