Cu3MgCl2(OH)6 and the bond-valence parameters of the OH-Cl bond
Cu3MgCl2(OH)6 and the bond-valence parameters of the OH-Cl bond
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DOI：
10.1107/s0108768106053870
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发表时间：
2007-02-01
影响因子：
1.9
通讯作者：
Schlueter, Jochen
中科院分区：
文献类型：
--
作者：
Malcherek, Thomas;Schlueter, Jochen
标题化合物是由Cu（OH）（4）Cl-2和Mg（OH）（6）八面体共边形成的片状物。片层之间仅通过O-H-Cl桥弱连接，从而产生沿沿着（001）的完全解理和粉末衍射测量中的强织构效应。由于Cu_3 MgCl_2（OH）（6）和几种相关化合物的Cl位的键价总和较低，根据所选的羟基氯化物的晶体结构，H/Cl对的键价参数已被修正为R-0 = 1.336和B = 0.53埃。
The title compound is a new mineral consisting of sheets made from edge-sharing Cu(OH)(4)Cl-2 and Mg(OH)(6) octahedra. The sheets are only weakly linked by O-H-Cl bridges, giving rise to perfect cleavage along (001) and to strong texture effects in powder diffraction measurements. Owing to low bond-valence sums at the Cl sites Of Cu3MgCl2(OH)(6) and of several related compounds, bond-valence parameters for the H/Cl pair have been refined to R-0 = 1.336 and b = 0.53 angstrom based on the crystal structures of selected hydroxychlorides.