Tetravalent, pentavalent and hexavalent uranium compounds of the type A2BB′O6

Abstract The preparation and characterization of a number of compounds of the type A 2 BB′O 6 where A = Ba, Sr, B = U(VI), U(V) or U(IV) and B′ is a divalent, trivalent or tetravalent ion respectively, were attempted. Most of the compounds were cubic with an ordered perovskite structure but the strontium compounds were pseudocubic, reindexable on an orthorhombic system.