Mixed occupancy: the crystal structure of scheelitetype LiLu[MoO4]2.

Coarse colorless single crystals of lithium lutetium bis[orthomolybdate(VI)], LiLu[MoO₄]₂, were obtained as a by-product from a reaction aimed at lithium derivatives of lutetium molybdate. The title compound crystallizes in the scheelite structure type (tetragonal, space group I4₁/a) with two formula units per unit cell. The Wyckoff position 4b (site symmetry ...) comprises a mixed occupancy of Li⁺ and Lu³⁺ cations in a 1:1 ratio. In comparison with a previous powder X-ray study [Cheng et al. (2015). Dalton Trans. 44, 18078–18089.] all atoms were refined with anisotropic displacement parameters. [ABSTRACT FROM AUTHOR]