An antimony-121 Mössbauer and electron spin resonance study of some antimony–molybdenum–oxygen and antimony–tungsten–oxygen compounds

Abstract

121-Antimony Mössbauer and e.s.r. spectroscopies have been used to examine Sb₂WO₆, Sb₂MoO₆, and Sb₂Mo₃O₁₂. In Sb₂WO₆ the cations are Sb^III and W^VI, but in Sb₂MoO₆ and Sb₂Mo₃O₁₂ the antimony is present as both Sb^III and Sb^V. This implies that some of the Mo exists in an oxidation state, or states, lower than VI. This is confirmed by e.s.r. spectroscopy.