Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1563160 | Computational Materials Science | 2009 | 4 Pages |
Abstract
The structural, mechanical and electronic properties of OsC2 were investigated by use of the density functional theory. Seven structures were considered, i.e., orthorhombic Cmca (No. 12, OsSi2), Pmmn (No. 59, OsB2) and Pnnm (No. 58, OsN2); tetragonal P42/mnm (No. 136, OsO2) and I4/mmm (No. 139, CaC2); cubic Fm–3m (No. 225, CaF2) and Pa-3 (No. 205, PtN2). The results indicate that Cmca in OsSi2 type structure is energetically the most stable phase among the considered structures. It is also stable mechanically. OsC2 in Pmmn phase has the largest bulk modulus 319 GPa and shear modulus 194 GPa. The elastic anisotropy is discussed.
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Authors
Jun Cai, Erjun Zhao, Zhijian Wu,