Pr5F[SiO4]2[SeO3]3: Another Complex Fluoride Oxosilicate Oxoselenate(IV).

Pale green single crystals of the title compound are obtained together with Pr3F[SeO3]4 by reaction of Pr2O3 (produced from elemental Pr and Pr6O11), PrF3, and SeO2 using CsBr as a fluxing agent (fused silica ampules, 750 °C, 5 d).