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2005
Structure
D 2000
03- 008
The Henicosaphosphide Iodides of Potassium and Rubidium, K4P21I and Rb4P21I.
— Single crystals of the novel polyphosphides of title are obtained from the reaction
of the elements (773 K, 3 d; sealed tube, preheating at 373 K for 6 h; ≈90% yield). The
isotypic compounds crystallize in the space group Cmcm with Z = 4. The structure consists of corrugated ∞2 [P321 ] networks formed by two different types of P7 subunits. The
layers are separated by chains of condensed iodine-centered M6 (M: K, Rb) trigonal
prisms. The mean P—P bond length of 2.216 Å corresponds to a single bond. —
(HOENLE*, W.; SCHMETTOW, W.; PETERS, K.; CHANG, J.-H.; VON
SCHNERING, H. G.; Z. Anorg. Allg. Chem. 630 (2004) 12, 1858-1862; MPI Chem.
Phys. fester Stoffe, D-01187 Dresden, Germany; Eng.) — Schramke
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