摘要:
During investigations of the systems MF2/KF/MF4 e. g. MF2/NaF/MF4 (M2+ = Ti2+, V2+, M4+ = Zr4+, Hf4+) we obtained blue crystals of VZrF6, VHfF6, KVZrF7, blue-green crystals of NaVHf2F11, yellow crystals of TiHfF6 and NaTiHf2F11, and yellow to rubyred crystals of TiZrF6, respectively. According to single crystal data, VZrF6 VHfF6 and TiZrF6 crystalizes in the ordered ReO3-type (cubic, Fm3m, a = 812,1(5), 804,2(8), and 821,0(2) pm, Z = 4). TiHfF6 crystatizes in a high-temperature-modification (cubic, ReO3- type, Pm3m, a = 392,3(2) pm, Z = 2). KVZrF7 is isotyic to KPdZrF7 (orthorhombic, Pnna, a = 1109,8(6), b = 788,0(7), c = 648,0(15) pm, Z = 4). NaTiHf2F11 and NaVHf2F11 crystalizes monoclinic (C2/m, a = 910,5(7), b = 675,9(7), c = 773,6(5) pm, beta= 116,10(6)degrees and a = 917,7(5), b = 685,7(5), c = 752,4 pm, beta = 118,28(1)degrees, Z = 2, respectively) and are also isotypic to already known AgPdZr2F11.