Acta Crystallographica Section E (Jul 2009)

Intercalated brucite-type layered cobalt(II) hydroxysulfate

  • Bunlawee Yotnoi,
  • Sanchai Luachan,
  • Timothy J. Prior,
  • Apinpus Rujiwatra

DOI
https://doi.org/10.1107/S160053680902251X
Journal volume & issue
Vol. 65, no. 7
pp. i52 – i52

Abstract

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In an attempt to synthesize new cobalt(II) sulfate framework structures using 1,4-diazabicyclo[2.2.2]octane as a template, crystals of poly[0.35-[hexaaquacobalt(II)] [tri-μ-hydroxido-μ-sulfato-dicobalt(II)]], {[Co(H2O)6]0.35[Co2(OH)3(SO4)]}n, were obtained as a mixture with [Co(H2O)6]SO4 crystals. The crystal structure can be described as being constructed from discrete brucite-type [Co4(OH)6(SO4)2] layers, each of which is built up from edge-shared [Co(OH)6] and [Co(OH)4(OSO3)2] octahedra, with partial intercalation by [Co(H2O)6]2+ ions. The absence of ca 30% of the [Co(H2O)6]2+ cations indicates partial oxidation of cobalt(II) to cobalt(III) within the layer.