Cu3MgCl2(OH)6 and the bond-valence parameters of the OH-Cl bond

The title compound is a new mineral consisting of sheets made from edge‐sharing Cu(OH)4Cl2 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‐valen...

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Bibliographic Details
Published in:Acta crystallographica. Section B, Structural science Structural science, 2007-02, Vol.63 (1), p.157-160
Main Authors: Malcherek, Thomas, Schlüter, Jochen
Format: Article
Language:English
Subjects:
bond-valence parameters
Chemical bonds
Crystal structure
Minerals
powder diffraction
Online Access:Get full text
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Summary:The title compound is a new mineral consisting of sheets made from edge‐sharing Cu(OH)4Cl2 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 R0 = 1.336 and b = 0.53 Å based on the crystal structures of selected hydroxychlorides.
ISSN:0108-7681
2052-5192
1600-5740
2052-5206
DOI:10.1107/S0108768106053870