Synthesis and crystal structure of silver(II) fluorides AgMIVF6 (MIV = Sn, Ti, Pb, Pd, Pt, Rh)

For the first time single crystals of AgSnF6 (light blue, triclinic with a = 519.93(7) pm, b = 524.96(10) pm, c = 563.13(9) pm, alpha = 115.66(2)degrees, beta = 89.28(2)degrees, gamma = 118.77(2)degrees, spcgr. P (1) over bar -C-i(1); (No. 2), Z = 1) and AgPdF6 (brown green, triclinic with a = 501.5(2) pm, b = 508.7(2) pm, c = 996.4(2) pm, alpha = 89.58(2)degrees, beta = 103.10(2)degrees, gamma = 120.88(2)degrees, spcgr. P (1) over bar -C-i(1), (No. 2), Z = 2) have been synthesized and investigated. Other compounds of this type, like AgTiF6 and AgPbF6 (isotypic to AgSnF6) or AgPtF6 and AgRhF6 (isotypic to AgPdF6) have been synthesized in form of microcrystalline powders, their lattice parameters have been determined by Guinier data. All compounds are structure variants oft the LiSbF6-type and isotypic with CuMF6 (M = Ti, Sn, Pb and Pd, Pt, respectively).