RbMn6(As2O7)2(As3O10):: a new manganese(II) arsenate

Single crystals of rubidium manganese arsenate, RbMn6- (As2O7)(2)(As3O10), have been prepared by a solid-state reaction at 1173 K. The compound crystallizes in the monoclinic system, space group P2(1)/m. The structure consists of a complex network of edge-sharing MnO6 octahedra, forming folded layers that are linked together by As2O7 and As3O10 groups, which is highly unusual. This arrangement delimits a tunnel parallel to the a-axis direction which accommodates Rb+.