NITRIDO SILICATES .1. HIGH-TEMPERATURE SYNTHESIS AND CRYSTAL-STRUCTURE OF CA2SI5N8
NITRIDO SILICATES .1. HIGH-TEMPERATURE SYNTHESIS AND CRYSTAL-STRUCTURE OF CA2SI5N8
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DOI：
10.1002/zaac.19956210624
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发表时间：
1995-06-01
影响因子：
1.4
通讯作者：
SCHNICK, W
中科院分区：
文献类型：
--
作者：
SCHLIEPER, T;SCHNICK, W
Ca 2Si 5 N8是通过二酰亚胺硅与金属钙在氮气气氛下在专门开发的高频炉中在1500至1600摄氏度之间的温度下进行反应获得的。Ca_2Si_5 N_8（Cc，a = 1435.2（3），B = 561.0（1），c = 968.9（2）pm，beta = 112.06（3）度，Z = 4，R = 0.023，wR = 0.018）含有Ca ~（2+）离子以及角共享的SiN_4四面体的三维共价网络结构。两种N以1：1的摩尔比出现，它们分别与两个和三个Si键合。
Ca2Si5N8 is obtained by reaction of silicon diimide with metallic calcium under nitrogen atmosphere performed in a specially developed high-frequency furnace at temperatures between 1500 and 1600 degrees C. Ca2Si5N8 (Cc, a = 1435.2(3), b = 561.0(1), c = 968.9(2) pm, beta = 112.06(3)degrees, Z = 4, R = 0.023, wR = 0.018) contains Ca2+ ions as well as a three-dimensional covalent network structure of corner-sharing SiN4 tetrahedra. Two sorts of N occur with molar ratio 1 :1 which are bonded to two and three Si, respectively.