Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1594085 | Solid State Communications | 2010 | 4 Pages |
Abstract
First principles calculations of the total energy of Mg2Si as a function of unit cell volume have been carried out for the cubic anti-fluorite (Fm3m) structure, the orthorhombic phase with anti-cotunnite (Pnma) structure and the hexagonal phase with Ni2In-type (P63/mmc) structure on the basis of density functional theory (DFT). All these calculations are performed with the CRYSTAL06 program package. In agreement with experiment, we also obtained the sequence of high-pressure phases for Mg2Si as: anti-fluorite →→ anti-cotunnite →→ Ni2In-type. Several structural properties (equilibrium lattice constant, bulk modulus, etc.) of the anti-fluorite structure have been calculated, which are also in agreement with the previous experimental results.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Jun-Hua Hao, Zhi-Guang Guo, Qing-Hua Jin,