Dirubidium aquapentachlorochromate(III) and dicaesium aquapentachlorochromate(III)
Journal article, 2004

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.


X-ray diffracrion

correlation between structural arrangement and radius ratio

Single crystal structure analysis


Annika Eriksson

Barbara Casari

Vratislav Langer

Chalmers, Department of Environmental Inorganic Chemistry

Acta Crystallographica Section C: Crystal Structure Communications

0108-2701 (ISSN) 1600-5759 (eISSN)

Vol. C60 4 i40-i42

Subject Categories

Chemical Sciences

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