High‐temperature synthesis of Rb2MnP2S6 in molten salt medium

Transparent yellow plates of rubidium manganese hexa­thio­diphosphate, Rb₂MnP₂S₆, were synthesized in molten RbBr. The compound is isotypic to other compounds of the type A₂MP₂Q₆ (A = K, Rb, Cs; M = Mn, Fe; Q = S, Se). Its structure can be viewed as columns of face‐sharing S₆ polyhedra parallel to the a axis, interconnected by Rb⁺. The S₆ polyhedra are centered alternately by Mn (in octahedral coordination) and P₂ units (in trigonal antiprisms). The Mn atom and P₂S₆ group lie on centers of symmetry.