• Mixed valency in the high-temperature phases of transition metal molybdates,AMoO4 (A=Fe, Co, Ni)

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    • Keywords


      Transition metal molybdates; mixed valency; high-temperature phases

    • Abstract


      Transition metal molybdates of the formulaAMoO4 whereA=Fe, Co or Ni exhibit a first-order phase transition between 670K–970K. An investigation of the lowtemperature (lt) and high-temperature (ht) phases by x-ray photoelectron spectroscopy, x-ray absorption spectroscopy, magnetic susceptibility and other physical methods shows that the phase transition is associated with a valence change of the typeA2++Mo6+αA3++Mo5+ in the cases of iron and cobalt molybdates.

    • Author Affiliations


      R A Mohan Ram1 J Gopalakrishnan1

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560 012, India
    • Dates

  • Journal of Chemical Sciences | News

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