Synthesis, dopant solubility, and thermostructural properties of Ca10.5−xTMx(VO4)7 (TM = Co, Cu) as function of transition metal content

Crystal structure and thermal expansion are determined for Ca 10.5− x TM x (VO 4 ) 7 (TM = Co, Cu) orthovanadates. The observed cation rearrangement with increasing temperature could account for the observed anomalies in the axial ratio and thermal expansion.