Startseite New copper selenites. Part A: K2Cu2(SeO3)3 and K2Cu3(SeO3)4
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New copper selenites. Part A: K2Cu2(SeO3)3 and K2Cu3(SeO3)4

Veröffentlicht/Copyright: 28. Juli 2010

Abstract

The new compounds K2Cu2(SeO3)3 and K2Cu3(SeO3)4 were synthesized in the course of low-hydrothermal experiments on natrochalcite-type selenate representatives. The crystal structures were determined by direct methods from single-crystal X-ray diffraction data. K2Cu2(SeO3)3: space group Cmcm, Z = 4, a = 5.312(1) Å, b = 9.858(3) Å, c = 17.595(5) Å, V = 921.4(4) Å3, R1 = 0.023. K2Cu3(SeO3)4: space group P[unk], Z = 1, a = 5.443(1) Å, b = 7.158(2) Å, c = 8.369(3) Å, α = 95.26(2)°, β = 108.58(2)°, γ = 92.17(2)°, V = 307.0(2) Å3; R1 = 0.035. Both compounds contain sheets built from edge- or cornersharing CuOn polyhedra (n = 5,6) and trigonal pyramidal selenite groups. These units are linked via the potassium atoms. In K2Cu2(SeO3)3 one of the two selenite groups is strongly disordered.

Published Online: 2010-7-28
Published in Print: 1998-5-1

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Heruntergeladen am 28.10.2025 von https://www.degruyterbrill.com/document/doi/10.1524/zkri.1998.213.5.266/pdf
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