CRYSTAL STRUCTURE OF KZR2(PO4)3

The structure of KZr2(PO4)3 has been determined from three-dimensional x-ray data. The crystals are rhombohedral with hexagonal unit cell a = 8.71, c = 23.89 Å, Dx = 3.22 g/cm3. The space group is [formula omitted] and there are six formula units per unit cell. It follows from the interatomic distances that the compound is potassium trisphosphatodizirconate denned by the formula K[Zr2(P04)3]. The coordination of the zirconium atom is sixfold in the shape of octahedron. Zr-O distances are 2.06 ± 0.01 Â. Six oxygen atoms are coordinated around a potassium atom in the shape of trigonal antiprism. K-O distances are 2.81 ± 0.01 Â. The distances in the PO4 group do not deviate significantly from the known data. © 1969, Walter de Gruyter. All rights reserved.