Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 4 (April 2004)

Acta Cryst. (2004). C60, i40-i42 [doi:10.1107/S0108270104002987]

Dirubidium aquapentachlorochromate(III) and dicaesium aquapentachlorochromate(III)

A. K. Eriksson, B. M. Casari and V. Langer

Abstract: The structures of the two novel title compounds, Rb₂[CrCl₅(H₂O)], (I), and Cs₂[CrCl₅(H₂O)], (II), have been determined by single-crystal X-ray diffraction. Compounds (I) and (II) crystallize with Pnma and Cmcm symmetry, respectively. In (I), the Cr, three Cl and water O atom lie on a mirror plane; in (II), the Cs, Cr, O and one of the Cl atoms are at sites with m2m symmetry. The chromate anions are in a pseudo-cubic environment of eight Rb⁺ cations in (I) and in a pseudo-octahedral environment of six Cs⁺ cations in (II). The structural arrangement correlates with the r_anion/r_cation radius ratio.

Formula: Cs₂[CrCl₅(H₂O)] and Rb₂[CrCl₅(H₂O)]

Online 20 March 2004


	Structure factor file (CIF format) (90.0 kbytes) Contains datablock I

	Structure factor file (CIF format) (44.1 kbytes) Contains datablock II

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