Crystal structure of a layered phosphate molybdate K2Gd(PO4)(MoO4)

Crystal structure of a layered phosphate molybdate K2Gd(PO4)(MoO4) / V. Zozulia et al. Acta Crystallographica Section E Crystallographic Communications. 2024. Vol. 80, no. 2. P. 117–119.

The title compound dipotassium gadolinium(III) phosphate(V) molybdate(VI), K2Gd(PO4)(MoO4), was synthesized from a high-temperature melt starting from GdF3 as a source of gadolinium. Its structure is isotypic with other MI 2MIII(MVIO4)(PO4) compounds, where MI = Na, K or Cs, and MIII = rareearth cation, MVI = Mo or W. The three-dimensional framework is built up from [Gd(PO4)(MoO4)] anionic sheets, which are organized by adhesion of [GdPO4] layers and [MoO4] tetrahedra stacked above and below these layers. The interstitial space is occupied by K cations having eightfold oxygen coordination.
The polyhedron of GdO8 was estimated to be a triangular dodecahedron by the continuous shape measurement method.