• Topotaxy in the oxidation of valentinite, Sb2O3, to cervantite, Sb2O4

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    • Abstract

       

      The oxidation of orthorhombic Sb2O3, valentinite, to orthorhombic Sb2O4, cervantite, has been shown by single crystal x-ray diffraction techniques to be a topotactic reaction. The orientation relationships between the two lattices have been determined by making use of a hybrid crystal. It has been found that the individual axes in the two oxides are parallel. The two crystal structures have been compared in the appropriate orientation and their close similarity has been established. The shifts of the individual atoms in valentinite during the process of oxidation have been calculated to be not more than 0·6 Å. It has been established that the reduction of cervantite to valentinite also takes place topotactically.

    • Author Affiliations

       

      P S Gopalakrishnan1 2 H Manohar1

      1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore - 560012
      2. Materials Science Division, National Aeronautical Laboratory, Bangalore - 560017
    • Dates

       
  • Pramana – Journal of Physics | News

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