La Phase Monoclinique Li₂Nb_0,5In_1,5(PO₄)₃

The crystallographic characterization of dilithium niobium-indium triphosphate reveals independant PO₄ tetrahedra and distorted MO₆ octahedra with a statistical distribution of Nb and In atoms of M = (Nb + 3 In)/4. The framework, built up from M₂(PO₄)₃ structural units, is isotypic with that of monoclinic phases Li₃M₂(PO₄)₃ where M = In, Fe, Sc. The present structure differs from the Li₃M₂(PO₄)₃ structure in the distribution of the Li⁺ cations; in particular the partial occupation of a lithium site has not been previous ones encountered before.

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