Inorganic Chemistry, Vol.55, No.14, 7167-7175, 2016
Compositional and Structural Versatility in an Unusual Family of anti-Perovskite Fluorides: [Cu(H2O)(4)](3)[(MF6)(M' F-6)]
A series of six anti-perovskite fluorides of the type [Cu(H2O)(4)](3)(M1-xM ' F-x(6))(2) (where M and M ' = V, Cr, Mn, Fe as well as M = Fe and M ' = V and Cr) was synthesized as high-quality single crystals via a mild hydrothermal route, These materials belong to a class of perovskite-based structures in which the anions and cations of the regular ABX(3) perovskite structure have exchanged positions. Two complex anions, MF63- and M ' F-6(3-), occupy the normal A and B cation positions, while three complex cations, [Cu(H2O)(4)](2+), occupy the normally anionic X positions. As in the ABX(3) compositions, the A and B positions can be occupied by different complex anions, allowing for the preparation of a wide range of compositions. Magnetic property measurements were performed on all six phases, and complex magnetic behavior was observed at low temperatures in the Mn, Fe, and bimetallic Fe/V and Fe/Cr phases.