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Issue 10, 1981
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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.

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Article type: Paper
DOI: 10.1039/DT9810002105
J. Chem. Soc., Dalton Trans., 1981, 2105-2111

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    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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