ChemInform Abstract: Subsolidus Phase Relations, Crystal Chemistry and Cation‐Transport Properties of Sodium Iron Antimony Oxides.

Abstract

Equilibria E 4000Subsolidus Phase Relations, Crystal Chemistry and Cation-Transport Properties of Sodium Iron Antimony Oxides. -Phase relations in the Na 2 O-Fe 2 O 3 -Sb 2 O x system are studied by powder XRD and three new compounds are identified besides the known orthorhombic compound Na2Fe3SbO8. Na4FeSbO6 possibly crystallizes in the trigonal space group P3112. Na2FeSbO5, which may be related to brownmillerite, crystallizes in the orthorhombic space group Pbcn. The pattern of Na4Fe3SbO9 could not be indexed. Ion-exchange reactions lead to a delafossite-type superlattice Ag3(NaFeSb)O6 with possible space group P3112. The cation-deficient layered phase Na0.8Fe0.9Sb0.1O2 exhibits high sodium ion conductivity. -(POLITAEV, V. V.; NALBANDYAN*, V. B.; Solid State