- The first fluoride A2[PtF6] of the K2PtCl6 type: β-Cs2[PtF6]
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For the first time, yellow cubic single crystals of Cs2[PtF6] have been obtained by solid state reaction, heating (Pt-tube, 35 d, 800°C) the fluorination product of an intimate mixture of (NH4)2PtCl6 and 2 CsCl (diluted F2, F2:N2 = 1:5, 10 d, 400°C). The new form is isostructural with K2PtCl6: Fm3m; a = 905.5(2) pm; Z = 4 (Guinier-de Wolff data, CuKα1); R = 2.32% (SHELX-76); 1398 I0(hk1), Image-Plate diffractometer data (Stoe IPDS). It is compared with already known α-Cs2[PtF6] (K2GeF6-type, P3m1). The Madelung-Part of Lattice Energy, MAPLE, Effective Coordination Numbers, ECoN, and Mean Fictive Ionic Radii, MEFIR, are calculated and discussed in comparison with the data of further Hexafluoroplatinates(IV). A complete analysis of MAPLE was carried out for the title compound as well as for the α- and a hypothetical α′-form. Johann Ambrosius Barth 1996.
- Bork,Hoppe
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