Abstract
Explorations of phases in the quaternary FeIII–BIII–PV–O system prepared by the high temperature solution growth (HTSG) method led to single-crystal growth of anhydrous diiron(III) borotriphosphate, Fe2[BP3O12]. This phase has been synthesized previously as a microcrystalline material and its structure refined in space group P3 from powder X-ray diffraction data using the Rietveld method [Chen et al. (2004 ▶). J. Inorg. Mater. 19, 429-432]. In the current single-crystal study, it was shown that the correct space group is P63/m. The three-dimensional structure of the title compound is built up from FeO6 octahedra (3.. symmetry), trigonal–planar BO3 groups ( symmetry) and PO4 tetrahedra (m.. symmetry). Two FeO6 octahedra form Fe2O9 dimers via face-sharing, while the anionic BO3 and PO4 groups are connected via corner-sharing to build up the [BP3O12]6− anion. Both units are interconnected via corner-sharing.
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