Structure Cristalline de TIVO3

Abstract

Thallium metavanadate (TIVO3) crystallizes in an orthorhombic lattice (space group Pbcm) with parameters a = 5.16, b = 11.22, c = 5.73 Å with Z = 4. The structure was determined using 255 independent reflections measured with an automatic diffractometer.Vanadium has a tetrahedral coordination in this structure. The tetrahedra are joined by having two oxygens in common to form chains (VO3)nn− parallel to the c axis.TIVO3 is established to be isomorphous to the metavanadates MVO3 (M = K, NH4, Rb, Cs). Thallium has a coordination number of ten analogous to that of the alkali metals. The study demonstrates that the 6s2 doublet of thallium is sterochemically inactive in TIVO3. [Journal translation]