Chemical preparation and crystal structure of an adduct between potassium cyclooctaphosphate and telluric acid: Te(OH)6 · K8P8O24 · 2H2O

U. Schülke, M. T. Averbuch-Pouchot and A. Durif


Te(OH)6 · K8P8O24 · 2 H2O is the first example of an adduct between telluric acid and a cyclooctaphosphate. We report its chemical preparation and its atomic arrangement. The title compound is triclinic P[unk], Z = 1 with the following unit cell dimensions: a = 11.315(9), b = 10.67(1), c = 7.547(3) Å α = 108.72(5), β = 100.30(2), γ = 66.80(5)°

Crystal structure was determined and refined to final R = 0.028 for 7265 independent reflections. The atomic arrangement is mainly characterized by the coexistence of independent units of [P8O24]8− ring anions and of Te(OH)6 groups, both centrosymmetric.

The hydrogen bond scheme is described. In addition, the internal symmetries and the geometries of the rare [P8O24]8− ring anions presently investigated are discussed.

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Zeitschrift für Kristallographie – Crystalline Materials offers a place for researchers to present results of their crystallographic studies. The journal includes theoretical as well as experimental research. It publishes Original Papers, Letters and Review Articles in manifold areas of crystallography.