The crystal structure of SnCl2. A correction
The crystal structure of SnCl2. A correction
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SnCl2 的晶体结构。
DOI：
10.1107/s0365110x6200273x
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发表时间：
1962
期刊：
影响因子：
--
通讯作者：
J. M. V. D. Berg
中科院分区：
文献类型：
--
作者：
J. M. V. D. Berg
为了重新检查硅线石类捕虏体的晶体（40.30%SiO_2、59.60%Al_2O_3、0.85%Fe_2O_3和0.07%TiO_2;理想成分为62.93%Al_2O_3）。测得的密度为3.226 ± 2g。cm.- 3.电子密度投影计算72个独立的反射上观察到的Weissenberg照片与铜辐射。通过重复的Fo-Fc合成，对结构进行了改进，最终R因子为0.071（0.068）。合成显示没有在莫来石中发现的类型的Al、Si* 最大值（图1（B））。最终的原子坐标与表1中的Hey & Taylor确定的原子坐标进行比较。z的分配
For the re-examination crystals of the sillimanite variety xenolite (40.30% SiO~, 59.60% A120 a, 0.85% FeeO a and 0" 07% TiO2; ideal composition 62" 93% AlzOs) were used. The measured density was 3.226 _+ 2 g. cm.-3. The electron-density projection was calculated from 72 independent reflexions observed on Weissenberg photographs taken with Cu radiation. The structure wa~ vrefined by repeated Fo-Fc syntheses, the final R factor being 0.071 (0.068). The syntheses showed no A1, Si* maximum of the type found in mullite (Fig. l (b)). The final atomic coordinates are compared with those determined by Hey & Taylor in Table 1. The assignment of the z