Issue 10, 1981

Structural studies on the caesium alums, CsMIII[SO4]2·12H2O

Abstract

Structure determinations of the caesium alums CsMIII[SO4]2·12H2O, M = V, Cr, Mn, Fe, Co, Al, Ga, or In, have been carried out at 295(1) K by X-ray diffraction methods. The data obtained include (i) MIII–O distances for the metals in the [M(OH2)6]3+ species [V–O, 1.992(6); Cr–O, 1.959(3); Mn–O, 1.991(6); Fe–O, 1.995(4); Co–O, 1.873(5); Al–O, 1.877(3); Ga–O, 1.944(3); and In–O, 2.112(4)Å], (ii) an estimate of 1.34Å for the effective co-ordinated radius for the water molecule in the cation, and (iii) the proposal of a new criterion for the classification of the different alum types, based on the disposition of the water molecules about the univalent cation.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1981, 2105-2111

Structural studies on the caesium alums, CsMIII[SO4]2·12H2O

J. K. Beattie, S. P. Best, B. W. Skelton and A. H. White, J. Chem. Soc., Dalton Trans., 1981, 2105 DOI: 10.1039/DT9810002105

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