Conductivity of a new pyrophosphate Sn0. 9Sc0. 1 (P2O7) 1− δ prepared by an aqueous solution method

Rong Lan, Shanwen Tao

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    33 Citations (Scopus)


    New pyrophosphate Sn0.9Sc0.1(P2O7)1−δ was prepared by an aqueous solution method. The structure and conductivity of Sn0.9Sc0.1(P2O7)1−δ have been investigated. XRD analysis indicates that Sn0.9Sc0.1(P2O7)1−δ exhibits a 3 × 3 × 3 super structure. It was found that Sn0.9Sc0.1(P2O7)1−δ prepared by an aqueous method is not conductive. The total conductivity of Sn0.9Sc0.1(P2O7)1−δ in open air is 2.35 × 10−6 and 2.82 × 10−9 S/cm at 900 and 400 °C respectively. In wet air, the total conductivity is about two orders of magnitude higher (8.1 × 10−7 S/cm at 400 °C) than in open air indicating some proton conduction. SnP2O7 and Sn0.92In0.08(P2O7)1−δ prepared by an acidic method were reported fairly conductive but prepared by similar solution methods are not conductive. Therefore, the conductivity of SnP2O7-based materials might be related to the synthetic history. The possible conduction mechanism of SnP2O7-based materials has been discussed in detail.

    Original languageEnglish
    Pages (from-to)380-385
    Number of pages6
    JournalJournal of Alloys and Compounds
    Issue number1-2
    Early online date16 Jul 2009
    Publication statusPublished - 3 Nov 2009


    • Conductivity
    • Pyrophosphate
    • Structure


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