Neue Fluorozirconate und -hafnate mit V2+ und Ti2+
2001
Bei systematischen Untersuchungen der Systeme MF2/KF/MF4 bzw. MF2/NaF/MF4 (M2+ = Ti2+, V2+, M4+ = Zr4+, Hf4+) erhielten wir blaue Kristalle von VZrF6, VHfF6, KVZrF7 und blau-grunes NaVHf2F11. TiHfF6 sowie NaTiHf2F11 sind gelb, TiZrF6 gelb bis orangerot.
Nach Einkristalldaten kristallisieren VZrF6, VHfF6 und TiZrF6 in einer geordneten ReO3-Variante (kubisch, Fm3m, a = 812,1(5), 804,2(8) und 821,0(2) pm, Z = 4), TiHfF6 dagegen in einer Hochtemperaturmodifikation (ReO3-Typ, kubisch, Pm3m, a = 393,3(2) pm, Z = 2). KVZrF7 ist isotyp zu KPdZrF7 (orthorhombisch, Pnna, a = 1109,8(6), b = 788,0(7), c = 648,0(15) pm, Z = 4). NaVHf2F11 und NaTiHf2F11 kristallisieren monoklin (C2/m, a = 910,5(7), b = 675,9(7), c = 773,6(5) pm, β = 116,10(6)°, Z = 2 bzw. a = 917,7(5), b = 685,7(5), c = 752,4 pm, β = 118,28(1)°) und sind isotyp zu AgPdZr2F11.
New Fluorozirconates and -hafnates with V2+ and Ti2+
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 crystalizes 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, β = 116,10(6)° and a = 917,7(5), b = 685,7(5), c = 752,4 pm, β = 118,28(1)°, Z = 2, respectively) and are also isotypic to already known AgPdZr2F11.
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