New mixed valence manganese (Mn2+/Mn3+) fluoride materials, Ba3Mn3F14 and NaBa7Mn7F34 have been synthesized and characterized by single-crystal X-ray diffraction, Powder X-ray diffraction and magnetic property measurement. Both compounds were synthesized by hydrothermal method using CF3COOH aqueous solution instead of aqueous HF. The aqueous solution of CF3COOH acted as a reducing agent, and reduce some of the Mn3+ to Mn2+ during hydrothermal reaction. The amount of CF3COOH also played important role for controlling reduction process. Ba3Mn3F14 exhibits a one-dimensional chain structure consisting of separate edge-shared Mn2+F6 trigonal prism and corner-shared Mn3+F6 distorted octahedra that run along the b-direction. NaBa7Mn7F34 exhibits a Jarlite-type structure consisting of corner-shared Mn2+F6, (Mn2+/Mn3+)F6 and Mn3+F6 distorted octahedra, which forms infinite helicoidal double-chains along b-axis. The synthesis, crystal structures and magnetic properties of new mixed valence manganese(Mn2+/Mn3+) fluoride materials will be presented. Crystal data: Ba3Mn3F14, Orthorhombic, space group Pnma (No. 62), a = 27.272(2), b = 5.6613(4), c = 7.4711(6) �, V = 1153.51(15) �3, Z = 4; NaBa7Mn7F34, Monoclinic, space group C2/m (No. 12), a = 16.961(9), b = 11.551(6), c = 7.651(4) �, � = 101.785(12)�,  V = 1467.4(13) �3, Z = 2.

Synthesis, structure, and characterization of new mixed valence manganese (Mn<sup>2+</sup>/Mn<sup>3+</sup>) fluorides

247th National Meeting (2014)

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Synthesis, structure, and characterization of new mixed valence manganese (Mn2+/Mn3+) fluorides

Synthesis, structure, and characterization of new mixed valence manganese (Mn²⁺/Mn³⁺) fluorides