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Structural systematics of the high-pressure phases of phosphorus, arsenic, antimony and bismuth

机译:磷,砷,锑和铋的高压相的结构系统

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New structural systematics of the high-pressure phases of the title elements are given on the basis of the results obtained in our diffraction studies and the results from the literature. Although the structural transition sequence with increasing pressure appears to be different for the four elements, reinterpretation of the structure data has shown that it is expressed in a systematic way as follows P A17-A7-PSC As A7-PSC- dist. BCC-BCC Sb A7- dist. BCC-BCC Bi A7-dist. PSC-dist. BCC-BCC. Notations used are A17 (orthorhombic layered struc ture), A7 (rhombohedral layered structure), PSC (primitive simple cubic structure), dist. PSC (monoclinic structure which is regarded as a distorted PSC), BCC (body-centered cubic structure) and dist. BCC (tetragonal structure which is regarded as a distorted BCC). Phosphorus lacks the post-PSC phases, but it is likely that the same transition sequence as that of arsenic is seen under extremely high pressure. Discussion is made on how the network of the densest atomic plane changes through the structural transition sequence.
机译:根据我们在衍射研究中获得的结果和来自文献的结果,给出了标题元素高压相的新结构体系。尽管对于四个元素来说,随着压力增加的结构转变顺序似乎有所不同,但对结构数据的重新解释表明,它以系统的方式表示为P A17-A7-PSC as A7-PSC-dist。 BCC-BCC Sb A7-距离BCC-BCC Bi A7-dist。 PSC-dist。密件抄送-密件抄送。所使用的符号是A17(斜方分层结构),A7(菱面体分层结构),PSC(原始简单立方结构),dist。 PSC(单斜晶结构,被认为是变形的PSC),BCC(体心立方结构)和dist。 BCC(四边形结构,被认为是变形的BCC)。磷缺乏PSC后阶段,但是在极高的压力下很可能会看到与砷相同的跃迁序列。讨论了最稠密原子平面的网络如何通过结构过渡序列发生变化。

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