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Structures, phase transition, elastic properties of SnO2 from first-principles analysis

机译:从第一性原理分析SnO2的结构,相变,弹性

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We investigate the structural, phase transition and elastic properties of SnO2 in the rutile-type, pyrite-type, ZrO2-type and cotunnite-type phases by the plane-wave pseudopotential density functional theory method. The lattice constants, bulk modulus and its pressure derivative are well consistent with the available experimental and other theoretical data. Also, we find that the rutile→pyrite, pyrite→ZrO2 and ZrO2→cotunnite phase transition occur at 12.9, 59.1 and 111.1 GPa, which are in better agreement with the experimental results than those of Gracia et al. (2007). Moreover, we obtain the pressure dependences of elastic constants for the four structures.
机译:我们通过平面波pseudo势密度泛函理论方法研究了金红石型,黄铁矿型,ZrO2型和co石型相中SnO2的结构,相变和弹性性能。晶格常数,体积模量及其压力导数与可用的实验数据和其他理论数据非常一致。此外,我们发现金红石→黄铁矿,黄铁矿→ZrO2和ZrO2→共tun石的相变发生在12.9、59.1和111.1 GPa,与Gracia等人的实验结果更加吻合。 (2007)。此外,我们获得了四种结构的弹性常数的压力依赖性。

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