Acta Cryst. (2006). E62, i190-i192  [ doi:10.1107/S1600536806032910 ]

[Na₃(H₂O)₁₁][CrMo₆O₂₄H₆]·2H₂O, with an Anderson B-type heteropolyoxoanion

L. Yu, S.-Z. Li and J.-P. Wang

Abstract: The structural unit of the title compound, poly[[hexa-₂-hydroxohexa-₃-oxoundecaoxochromiumhexamolybdenum]--oxo-[tetra-₂-aquahexaaquatrisodium]--aqua], [CrMo₆Na₃O₁₈(OH)₆(H₂O)₁₁]·2H₂O, consists of an Anderson B-type heteropolyoxoanion [CrMo₆O₂₄H₆]^3- with approximate D_3h point symmetry, an [Na₃(H₂O)₁₁]³⁺ cation chain and two water molecules of crystallization. The [CrMo₆O₂₄H₆]^3- anions are connected via Mo--O-Na bonds to the [Na₃(H₂O)₁₁]³⁺ groups to form one-dimensional double chains extending parallel to the c axis.

Online 23 August 2006

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