Acta Crystallographica Section C

Crystal Structure Communications

Volume 58, Part 6 (June 2002)


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Acta Cryst. (2002). C58, i76-i78    [doi:10.1107/S0108270102006753]

NaMn6(P2O7)2(P3O10) and KCd6(P2O7)2(P3O10)

J. Bennazha, A. El-Maadi, A. Boukhari and E. M. Holt

Abstract: The crystal structures of two new diphosphates, sodium hexamanganese bis(diphosphate) triphosphate, NaMn6(P2O7)2(P3O10), and potassium hexacadmium bis(diphosphate) triphosphate, KCd6(P2O7)2(P3O10), confirm the rigidity of the M6(P2O7)2(P3O10) matrix (M is Mn or Cd) and the relatively fixed dimensions of the tunnels extending in the a direction of the unit cell. The compounds are isomorphous; the P2O74- anion and the alkali metal cations lie on mirror planes. Bond-valence analysis of the bonding details of the atoms found within the tunnels permits a prediction of the conductivity.

Formula: NaMn6(P2O7)2(P3O10) and KCd6(P2O7)2(P3O10)

Online 11 May 2002

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Structure factor file (CIF format) (129.9 kbytes)
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Structure factor file (CIF format) (140.7 kbytes)
Contains datablock II

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