Syntheses and crystal structures of Co₃(C₂O₄)(SeO₃)₂ and Zn(C₂O₄)×2H₂O

Author(s)

Gerald Giester

Abstract

Co₃(C₂O₄)(SeO₃)₂ and Zn(C₂O₄).2H₂O were synthesized during the investigation of the reaction products of Fe(C₂O₄).2H₂O and SeO₂ combined with transition metal elements at low-hydrothermal conditions. The crystal structures were detd. by direct methods from single-crystal x-ray diffraction data. Co₃(C₂O₄)(SeO₃)₂: space group C2/m, Z = 2, a = 9.163(2), b = 6.513(2), c = 7.806(2) Å, β = 117.14(2)°, V = 414.6(2) ų, R1 = 0.023. Zn(C₂O₄).2H₂O: space group C2/c, Z = 4, a  =11.812(3), b = 5.402(1), c = 9.919(2) Å, β = 127.72(1)°, V 500.6(1) ų, R1 = 0.029. Both compds. consist of MO₆ octahedra (M = Co, Zn) linked via the oxalate groups to chain-like subunits. These are further combined via addnl. CoO₆ octahedra and the trigonal pyramidal selenite group or via H bonds, resp. Mean bond lengths are 2.119 and 2.099 Å for Co^[6]-O, 1.701 Å for Se(IV)^[3]-O, and 2.094 Å for Zn ^[6]-O.

Organisation(s)

Department of Mineralogy and Crystallography

Journal

Zeitschrift für Kristallographie : international journal for structural, physical, and chemical aspects of crystalline materials

Volume

212

Pages

720-723

No. of pages

24

ISSN

0044-2968

DOI

https://doi.org/10.1524/ZKRI.1997.212.10.720

Publication date

10-1997

Peer reviewed

Yes

Austrian Fields of Science 2012

105113 Crystallography, 104011 Materials chemistry

Portal url

https://ucrisportal.univie.ac.at/en/publications/632404b8-c301-40e2-8c92-ae25e478c44b