The Synthesis and Characterization of a New Manganese Phosphate Templated by Piperazine

An organically templated manganese phosphate, Mn6(H2O)2(HPO4)4(PO4)2·C4N2H12·H2O, has been synthesized hydrothermally and characterized by synchrotron powder X-ray diffraction, thermogravimetric analysis, and magnetic measurements. The compound is structurally closely related to both a magnesium pho...

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Bibliographic Details
Published in:Journal of solid state chemistry 2001-01, Vol.156 (1), p.32-36
Main Authors: Kongshaug, Kjell Ove, Fjellvåg, Helmer, Lillerud, Karl Petter
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Inorganic compounds
Miscellaneous
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary:An organically templated manganese phosphate, Mn6(H2O)2(HPO4)4(PO4)2·C4N2H12·H2O, has been synthesized hydrothermally and characterized by synchrotron powder X-ray diffraction, thermogravimetric analysis, and magnetic measurements. The compound is structurally closely related to both a magnesium phosphate and an iron phosphate, and crystallizes in the triclinic space group P-1 (No. 2) with a=12.81926(12) Å, b=15.87361(20) Å, c=6.47912(7) Å, α=99.8660(11)°, β= 90.3913(10)°, γ=103.4265(9)°, V=1261.928(25) Å3, and Z=2. The structure consists of anionic sheets of manganese phosphate separated by piperazinium cations and water molecules. The basic building unit of the inorganic layers is a hexamer of edge-sharing Mn polyhedra. Magnetic susceptibility measurements and bond valence calculations confirm the assignment of high-spin Mn2+ (d5) in the title compound.
ISSN:0022-4596
1095-726X
DOI:10.1006/jssc.2000.8954