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Ferric Phosphite: Dimers of Face-Sharing FeIIIO6 Octahedra. Crystal Structure Redetermination, Mössbauer Spectra, Magnetic Susceptibility, and Heat Capacity Data

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Ensling, J., Gütlich, P., Schmidt, R., & Kniep, R. (1994). Ferric Phosphite: Dimers of Face-Sharing FeIIIO6 Octahedra. Crystal Structure Redetermination, Mössbauer Spectra, Magnetic Susceptibility, and Heat Capacity Data. Inorganic Chemistry, 33(16), 3595-3597. doi:10.1021/ic00094a024.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-B8F6-E
Abstract
Synthesis, structural characterization, and physical properties of Fe2(HPO3)3 are reported. The structure establishes the phosphite anion as a bridging unit producing dimers of face-sharing Fe(III)O6 octahedra. The Fe2O9 units are interconnected by sharing common apices with HPO3 tetrahedra, resulting in a three-dimensional arrangement. These structural characteristics determine the physical properties of the compound. A weak antiferromagnetic exchange interaction in the dimeric entities and a three-dimensional ordering below 20 K of antiferromagnetic nature can be detected using Mossbauer, susceptibility, and beat capacity data.