McMahon MI, Degtyareva O, Nelmes RJ
Department of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
Phys Rev Lett. 2000 Dec 4;85(23):4896-9. doi: 10.1103/PhysRevLett.85.4896.
The long-unknown crystal structure of Bi-III has been solved. It comprises a body-centered-tetragonal (bct) "host" and a bct "guest" component made up of chains that lie in channels in the host; the guest is incommensurate with the host along the tetragonal c axis. Diffraction data for Sb-II reveal that it too can be fitted with the same composite structure. The structures of these two high-pressure phases of Bi and Sb are similar to those reported recently in the alkaline-earth metals Ba and Sr.
铋（III）长期未知的晶体结构已被解析。它由一个体心四方（bct）“主体”和一个由位于主体通道中的链组成的bct“客体”成分构成；客体沿四方c轴与主体不相称。锑（II）的衍射数据表明，它也可以用相同的复合结构来拟合。铋和锑这两个高压相的结构与最近报道的碱土金属钡和锶的结构相似。
