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Synthesis and structure of cobalt (II) oxide halides—Sr2CoO2X2 (X = Cl, Br)

Synthesis and structure of cobalt (II) oxide halides—Sr2CoO2X2 (X = Cl, Br)
Synthesis and structure of cobalt (II) oxide halides—Sr2CoO2X2 (X = Cl, Br)
The first layered cobalt (II) oxide halides, Sr2CoO2Cl2 and Sr2CoO2Br2, have been synthesized and their structures determined from Rietveld refinement of powder X-ray data. The materials are structural analogues of the K2NiF4 cuprate phase Sr2CuO2Cl2, crystallizing in space group I4/mmm. The compounds contain CoO2 square planes separated by SrX layers (X=Cl,Br). The bromide material displays the expected increase in cell dimensions, i.e., for Sr2CoO2Cl2, a=4.06251(5) Å, c=15.1251(3) Å and for Sr2CoO2Br2, a=4.08891(7) Å, c=16.4077(4) Å.
oxyhalide, k2nif4-type structure, anion ordered, cobalt (ii), powder x-ray diffraction, crystal
0022-4596
1-4
Knee, Christopher S.
de0aa2be-ddad-45dd-97f5-ae2f25de5207
Weller, Mark T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Knee, Christopher S.
de0aa2be-ddad-45dd-97f5-ae2f25de5207
Weller, Mark T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4

Knee, Christopher S. and Weller, Mark T. (2002) Synthesis and structure of cobalt (II) oxide halides—Sr2CoO2X2 (X = Cl, Br). Journal of Solid State Chemistry, 168 (1), 1-4. (doi:10.1006/jssc.2002.9682).

Record type: Article

Abstract

The first layered cobalt (II) oxide halides, Sr2CoO2Cl2 and Sr2CoO2Br2, have been synthesized and their structures determined from Rietveld refinement of powder X-ray data. The materials are structural analogues of the K2NiF4 cuprate phase Sr2CuO2Cl2, crystallizing in space group I4/mmm. The compounds contain CoO2 square planes separated by SrX layers (X=Cl,Br). The bromide material displays the expected increase in cell dimensions, i.e., for Sr2CoO2Cl2, a=4.06251(5) Å, c=15.1251(3) Å and for Sr2CoO2Br2, a=4.08891(7) Å, c=16.4077(4) Å.

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More information

Published date: 2002
Keywords: oxyhalide, k2nif4-type structure, anion ordered, cobalt (ii), powder x-ray diffraction, crystal

Identifiers

Local EPrints ID: 19785
URI: http://eprints.soton.ac.uk/id/eprint/19785
ISSN: 0022-4596
PURE UUID: cb7366bf-6a83-4870-bf00-43e2e77a8535

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Date deposited: 21 Feb 2006
Last modified: 08 Jan 2022 01:00

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Contributors

Author: Christopher S. Knee
Author: Mark T. Weller

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