Synthesis and solid state studies on Mb2Sb2O7 and (Mn1−xCdx)2Sb2O7 pyrochlores Academic Article uri icon

abstract

  • Pyrochlore oxides of the type Mn2Sb2O7 and (Mn1-xCdx)2Sb2O7 have been synthesized by high-temperature solid state reactions and characterized by X-ray diffraction and chemical analysis. X-Ray diffraction studies showed that the compound Mn2Sb2O7 has a rhombohedrally distorted pyrochlore structure. In the solid solutions (Mn1-xCdx)2Sb2O7, the phases with x ≥ 0.6 are cubic. Magnetic and 121Sb Mössbauer studies indicate that all the Mn and Sb are present in the +2 and +5 state occupying A and B sites, respectively, in the pyrochlore structure. Electrical measurements indicate that the compounds are insulators or semiconductors exhibiting p-type behavior. The stoichiometry and probable cause of the rhombohedral distortion in Mn2Sb2O7 and solid solutions are discussed. © 1984.

author list (cited authors)

  • Subramanian, M. A., Clearfield, A., Umarji, A. M., Shenoy, G. K., & Rao, G.

citation count

  • 26

publication date

  • April 1984