The monoclinic form of trilithium dichromium(III) tris(orthophosphate)

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Abstract

The monoclinic form of trilithium dichromium(III) tris(orthophosphate), Li3Cr2(PO4)3, was prepared by the reactive halide flux method. The structure of the title compound is composed of a three-dimensional anionic framework with composition ∞ 3[Cr2(PO4)3]3- and Li+ ions situated in the empty channels. The rigid framework built up from CrO6 octahedra and PO4 tetrahedra is the same as that found in other monoclinic Li3 M 2(PO4)3 (M = Fe, Sc, V) phases. The three Li+ cations of Li3Cr2(PO4)3 are unequally disordered over six crystallographically different sites. The classical charge balance of the title compound can be represented as [Li+]3[Cr3+]2[P5+]3[O2-]12. Solid-state UV/Vis spectra indicate that the crystal filed splitting (Δ0) of the Cr3+ ion is around 2.22 eV.

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Sun, J., Kim, P., & Yun, H. (2013). The monoclinic form of trilithium dichromium(III) tris(orthophosphate). Acta Crystallographica Section E: Structure Reports Online, 69(10). https://doi.org/10.1107/S1600536813026433

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