Un nouveau fluorure de platine : PtIIPtIVF6

The Mixed Valence Structure of “R-NiF3”

“…Data points are marked as crosses, profile fit as the upper continuous line, difference as the lower continuous line and reflection positions as tick marks. to predict a Pt±F±Pt bond angle of 131°in Pt[PtF 6 ], for which atom positions have never been determined [3].…”

“…Diffuse reflectance UV-visible spectra were recorded on samples mounted in a PTFE cell, as described previously [23], on a Perkin Elmer Lambda 19 spectrometer. All high temperature fluorinations were carried out in a 300 cm 3 Monel autoclave sealed with a copper gasket, except for RhF 3 which was made in an alumina boat placed in a silica tube through which 10% F 2 in N 2 was flowed during heating. Samples were checked for purity by PXD and UVvisible spectroscopy before use.…”

“…Die Struktur von gemischt-valentem ¹R±NiF 3 The trifluorides of many metals form as approximately hexagonal closest packed fluoride arrays of R3c symmetry (VF 3 type), with the metal occupying one third of octahedral holes [1]. For palladium [2] and platinum [3], as well as a large number of ternary fluorides [4], the lower symmetry R3 space group is observed and the structure type is that of LiSbF 6 .…”

“…For palladium [2] and platinum [3], as well as a large number of ternary fluorides [4], the lower symmetry R3 space group is observed and the structure type is that of LiSbF 6 . This allows for two different metal sites in alternate layers and mixed valence formulations such as Pd II [Pd IV F 6 ] for``PdF 3 º, which has been shown by powder neutron diffraction to contain discrete palladium(II) and palladium(IV) sites [2].…”

Structural architecture and physical properties of some inorganic fluoride series: a review

“…Several structural types have been proposed depending on the presence or absence of a cationic ordering (see for instance [1]). It was previously demonstrated by neutron diffraction that so-called ''PdF 3 00 was, in fact, Pd 2 F 6 , with an ordering between Pd II and Pd IV species [12]. The compound crystallized in the LiSbF 6 -type (space group R3).…”