Hexafluorides and Hexafluorometallates

Chemical and physical properties of the hexafluorides recently have been reviewed by Weinstock (321), who also accounted for the structures of these volatile compounds in the solid state. The vibrational properties of hexafluoride molecules have been summarized by Weinstock and Gooiman (325). 

Since the discovery of CrFs (113) metal hexafluorides are known of all three transition series. There is a marked decrease of stability within each series Thus PdFa could not be prepared yet and its homologe PtFa (324) exhibits an extreme oxidizing power, that played an important role in the preparation of the first rare gas compounds (76). 

Not e added in proof Lattice constants of transition metal hexafluorides, both cubic and orthorhombic, have been published by Siegel and Northrop 286a) recently. 

The rhombohedral lattice constants of some compounds LiMeFg and NaMeFg, isostructural with NaOsFg, were already stated by Boston and Sharp 46). The structure analysis of this type was performed somewhat later in the case of the compound LiSbFg 59). According to the investi- 

In view of the relation shown between the structures of the VFs and the LiSbF -type, some ternary fluorides AMeFe to which the VFs- 

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