KCu(SeO4)Cl(H2O)2, a first copper chloride selenate
Author:
Siidra Oleg I.12, Markovski Mishel R.1
Affiliation:
1. Department of Crystallography , St. Petersburg State University , University Emb. 7/9 , 199034 , St. Petersburg , Russia 2. Kola Science Center, Russian Academy of Sciences , Apatity , 184200 , Murmansk Region , Russia
Abstract
Abstract
A first copper chloride selenate was obtained upon attempted preparation of a selenate analog of chlorothionite. The new compound is monoclinic, P21/c, a = 7.1833(5) Å, b = 11.7784(8) Å, c = 8.2419(6) Å, β = 91.083(2)°, V = 697.20(8) Å3, R
1 = 0.033. KCu(SeO4)Cl(H2O)2 has no structural analogs and adds to the small family of transition metal selenate halides. The CuO3(H2O)2Cl strongly distorted octahedra share common O–O edges thus forming dimeric units with a Cu–Cu distance of 3.49 Å. Dimeric units and SeO4 tetrahedra in KCu(SeO4)Cl(H2O)2 share common O atoms to produce unique [Cu(SeO4)Cl(H2O)2]− chains. We discuss further perspectives of the selenate halide family and expected differences in crystal chemistry of sulfate and selenate halides.
Publisher
Walter de Gruyter GmbH
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science
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