Acta Cryst. (2007). E63, i95-i96  [ doi:10.1107/S1600536807008690 ]

Trisodium dicalcium bismuth hexaoxide

I. V. Puzdrjakova, R. B. Macquart, M. D. Smith and H.-C. zur Loye

Abstract: Single crystals of the title compound, Na₃Ca₂BiO₆, were grown from a high-temperature reactive flux solution of Na₂CO₃. Na₃Ca₂BiO₆ crystallizes as an ordered rock-salt structure (space group Fddd), in which the octahedral holes in the oxide array are filled by an ordered 3:2:1 arrangement of Na⁺, Ca²⁺ and Bi⁵⁺ cations. All atoms except for one O atom lie on special positions; site symmetries are as follows: Bi 222, Ca 2, Na 222 and 2, O 2.

Online 28 February 2007

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