Crystal structure of K4MnMo4O15 — A parent compound of a new isostructural series of complex oxides K4M2+Mo4O15 (M2+ = Mn, Mg, Co, Cd)

The structure of K4MnMo4O15 was solved from single-crystal X-ray diffraction data (a = 10372, c = 8.160 Å, Z = 2, space group P-3, 2152 reflections, R = 0.039). The structure is of new, glaserite-like, type. A characteristic and original feature of the structure is a Mn(II)O6 octahedron with six MoO4 tetrahedra attached to it by their vertices; the octahedron is linked with a MoO6 octahedron by a common face. The MoO4 tetrahedra bridge the octahedral dimers with each other, forming lacy layers with potassium atoms lying between the layers. K4M2+Mo4O15 (M2+= Mg, Co, Cd) phases, which have similar structures, have been synthesized and characterized.