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Synthesis and Characterization of Mn6(PO4)4·H2O, a New Metal(II) Phosphate Hydrate

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Published/Copyright: June 2, 2014
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The new manganese phosphate hydrate,Mn6(PO4)H2O, has been obtained as a single phase product using hydrothermal methods and the structure has been determined by single crystal X-ray diffraction. The title compound crystallizes in the monoclinic space group Cc with a = 934.18(10), b = 1743.68(18), c = 815.15(8) pm, β = 92.616(2)°, V = 1326.4(2)·106 pm3, Z = 4, and the refinement led to R1 = 0.0281 and Rw2 = 0.0728 (all data). The structure is composed of [PO4] and [MnOx] polyhedra (x = 6, 7) and might be described as a distorted primitive hexagonal packing of [PO4] tetrahedra which are held together by Mn2+ ions partially located in distorted trigonal prismatic positions. This leads to a dense three-dimensional framework structure. Magnetic susceptibility measurements verified the presence of high-spin Mn2+ ions and thermogravimetric data confirm the chemical composition deduced from the single crystal structure determination.

Received: 2001-9-24
Published Online: 2014-6-2
Published in Print: 2002-2-1

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