RbZnFe(PO4)2: synthesis and crystal structure

A new iron phosphate, rubidium zinc iron(III) phosphate, RbZnFe(PO4)2, has been synthesized as single crystals by the flux method. This compound is isostructural to the previously reported KCoAl(PO4)2 [Chen et al. (1997[Chen, X.-A., Zhao, L., Li, Y., Guo, F. & Chen, B.-M. (1997). Acta Cryst. C53, 1754-1756.]). Acta Cryst. C53,1754–1756]. Its structure consists of a three-dimensional framework built up from corner-sharing PO4 and (Zn,Fe)O4 tetra­hedra. This mode of linkage forms channels parallel to the [100], [010] and [001] directions in which the Rb+ ions are located.