Non-centrosymmetric Rb2Mn2(MoO4)3
Chahira BouzidiMohamed Faouzi ZidAhmed DrissAmira Souilem
Abstract
The title compound, dirubidium dimanganese(II) tris(tetraoxomolybdate), Rb 2 Mn 2 (MoO 4 ) 3 , was prepared by solid-state reactions. The structure can be described as being composed of MnO 6 octahedra sharing corners with MoO 4 tetrahedra. The three-dimensional framework contains cavities in which the rubidium ions are located. The Rb + cations are within distorted nine- and 12-vertex polyhedra. The pairs of different Mn 2+ and Rb + cations are each located on threefold rotation axes.. Rb 2 Mn 2 (MoO 4 ) 3 is isotypic with compounds of the Cs 2 M 2 Mo 3 O 12 ( M = Ni, Fe) family. A comparative structural description is provided between the structure of the title compound and those of related phases. Differences with structures such as alluaudite are discussed.
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