Synthesis and structure of A4V6[Te24+Te6+]O24 (A = K, Rb)—two new quaternary mixed-valent tellurium oxides†
Abstract
Two new mixed-valent tellurium oxides with vanadium(V), A4V6[Te24+Te6+]O24 (A = K and Rb), have been synthesized by hydrothermal and conventional solid state techniques. Their structures were determined by c (No. 167) with a = b = 9.7075(6) Å, c = 42.701(3) Å, V = 3484.9(4) Å3, and Z = 6; Rb4V6Te3O24, trigonal, space group R
c (No. 167) with a = b = 9.8399(9) Å, c = 43.012(4) Å, V = 3606.6(6) Å3, and Z = 6.