Growth and crystal structure of binary molybdate CsFe(MoO4)2

CsFe(MoO4)2 single crystals have been grown by solution-melt crystallization with a charge-to-solvent ratio of 1: 3 (with Cs2Mo3O10 used as a solvent). The crystal structure of this compound has been refined by X-ray diffraction (X8 APEX automatic diffractometer, MoKα radiation, 356 F(hkl), R = 0.0178). The trigonal unit cell has the following parameters: a = b = 5.6051(2) A, c = 8.0118(4) A, V = 217.985(15) A3, Z = 1, ρcalc = 3.875 g/cm3, and sp. gr. P\( \bar 3 \)m1. The structure is composed of alternating layers of FeO6 octahedra (with MoO4 tetrahedra attached by sharing vertices) and CsO12 icosahedra.