Acta Cryst. (2008). E64, i73  [ doi:10.1107/S1600536808030328 ]

catena-Poly[tetrasodium [[cis-dioxido-trans-bis(sulfato-O)molybdate(VI)]--sulfato-²O:O']]

S. J. C. Schäffer and R. W. Berg

Abstract: Single crystals of the title compound, {Na₄[Mo^VIO₂(SO₄)₃]}_n, were grown from a melt of MoO₃ and Na₂SO₄ in Na₂S₂O₇. In contrast to the structure of the isoformular K compound, K₄[Mo^VIO₂(SO₄)₃], with its monomeric anion, this sodium analogue contains a polymeric anion of the type {[Mo^VIO₂(SO₄)₂--(SO₄)]^4-}_n. The Mo^VI cations, surrounded by two tightly bonded O atoms and four O atoms of one bridging and two terminal sulfato ligands, form zigzag chains parallel to [100]. All four Na⁺ cations are situated between the anionic chains and have distorted octahedral coordination spheres.

Online 15 October 2008

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