CLATHRATE STRUCTURE OF SILICON AND NAXSI136 (X[11)
CLATHRATE STRUCTURE OF SILICON AND NAXSI136 (X[11)
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DOI：
10.1126/science.150.3704.1713
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发表时间：
1965-01-01
期刊：
影响因子：
56.9
通讯作者：
CROS, C
中科院分区：
文献类型：
--
作者：
KASPER, JS;HAGENMULLER, P;CROS, C
本文从X射线衍射图上解出了硅-钠体系中两个新立方相的晶体结构。这两种结构都是在气体水合物中发现的笼形物类型，由四面体网络组成，四面体网络是一种情况下具有14面多面体的五边形十二面体和另一种情况下具有16面多面体的组合。水合物结构中的硅位置和氧位置之间存在严格的对应关系。对于一种化合物Na 8 Si 46，所有多面体的中心都被钠原子占据。对于另一种化合物，只发生部分占据的多面体笼。
The crystal structure of two new cubic phases in the silicon-sodium system have been solved from their x-ray diffraction patterns. Both structures are of the clathrate type found for gas hydrates, consisting of tetrahedral networks which are combinations of pentagonal dodecahedra with 14-face polyhedra in one case and with 16-face polyhedra in the other case. There is strict correspondence between the silicon positions and the oxygen positions of the hydrate structures. For one compound, Na8Si46, the centers of all polyhedra are occupied by sodium atoms. For the other compound, there occurs only partial occupancy of the polyhedral cages.