An uncommon Cu[2+4]O6coordination polyhedron in the crystal structure of KCu3(OH)2[(AsO4)H(AsO4)] (with a comparison to related structure types)
- 1 January 1989
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Kristallographie
- Vol. 188 (1-2) , 43-56
- https://doi.org/10.1524/zkri.1989.188.1-2.43
Abstract
Crystals of KCu 3 (OH) 2 [(AsO 4 )H(AsO 4 )] were synthesized under hydrothermal conditions at ∼ 500 K. The crystal structure was solved from 1386 single crystal X-ray data: a = 10.292(5) Å, b = 5.983(3) Å, c = 7.877(4) Å, β = 117.86(2)°, space group C 2/ m , Z = 2, R = 0.033. One of the two crystallographically different copper coordination polyhedra is a “compressed octahedron” with two “short” (axial) and four “medium” (equatorial) Cu – O bonds [1.899(2) Å, 2× and 2.186(1) Å, 4×]. The other Cu atom as usual is [4 + 2] coordinated [Cu – O = 1.934(1) Å, 2×, 2.000(1) Å, 2×, and 2.428(2) Å, 2×]. Each two arsenate tetrahedra are connected to dimers by a symmetry restricted hydrogen bond of 2.490(6) Å. The structure type of KCu 3 (OH) 2 [(AsO 4 )H(AsO 4 )] is strongly related with that of NaCu 2 (H 3 O 2 )(SO 4 ) 2 (natrochalcite) and Cu 2 O(SO 4 ) (dolerophanite).Keywords
This publication has 16 references indexed in Scilit:
- On the crystal chemistry of three copper(II)-arsenates: Cu3(AsO4)2-III, Na4Cu(AsO4)2, and KCu4(AsO4)3Monatshefte für Chemie / Chemical Monthly, 1988
- Contribution to the stereochemistry of copper. The transition from a tetragonal pyramidal to a trigonal bipyramidal Cu(II)O5 coordination figure with a structure determination of PbCu2(SeO3)3Journal of Solid State Chemistry, 1988
- The continuous transition from a tetragonal pyramidal to a trigonal bipyramidal CuIIO5coordination figureActa Crystallographica Section A Foundations of Crystallography, 1987
- The crystal structure of the natrochalcite-type compounds Me+Cu2(OH)(zO4)2· H2O [Me+= Na, K, Rb; z = S, Se], with special reference to the hydrogen bondsZeitschrift für Kristallographie, 1987
- Synthesis and crystal structure of Na5Cu3(PO4)2(PO4HPO4)Zeitschrift für Kristallographie, 1985
- Cu2O(SO4), dolerophanite: Refinement of the crystal structure, with a comparison of [O Cu(II)4] tetrahedra in inorganic compoundsMonatshefte für Chemie / Chemical Monthly, 1985
- The crystal structures of sodalite-group mineralsActa crystallographica Section B, Structural science, crystal engineering and materials, 1984
- Empirical parameters for calculating cation–oxygen bond valencesActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1976
- Heavy-metal molybdates. I. Crystal structure of a basic zinc molybdate, NaZn2OH(H2O)(MoO4)2Inorganic Chemistry, 1976
- The crystal structure of paratacamite, Cu2(OH)3ClActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1975