Abstract

Single crystals of the title compound, dipotassium aluminium tin(IV) tris­[phosphate(V)], K2AlSn(PO4)3, were synthesized by a high temperature reaction in a platinum crucible. In the structure, the AlIII and SnIV atoms occupy the same site on a threefold rotation axis with occupational disorder in a 1:1 ratio. In the three-dimensional structure, Al/SnO6 octa­hedra and PO4 tetra­hedra are inter­connected via their vertices, yielding a [Al/SnP3O12]n framework. The K atoms (site symmetry 3) reside in the large cavities delimited by the [Al/SnP3O12]n framework, and are surrounded by 12 O atoms.

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