BaSO4CaSO4 solid solutions isotypic with BaSO4

Flux growth of baryte-type BaSO4 from chloridic alkaline metal solvents

“…First, this host offers the possibility to substitute the sulphur ion in the SO 2À 4 -tetrahedron by fourfoldcoordinated TM ions in their high valence states (typically TM 5+ or TM 6+ ). Second, BaSO 4 forms solid solutions with SrSO 4 [1] and CaSO 4 [2]. In this series, the refractive index n decreases with decreasing size of the cation.…”