The single crystal structures of the copper usovites Ba2CaCuV2F14 and Ba2CaCuCr2F14
Language
en
Article de revue
This item was published in
Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie. 2008, vol. 634, n° 15, p. 2737-2739
Wiley-VCH Verlag
English Abstract
The results of single crystal X-ray structure determinations are reported for Ba2CaCuV2F14 (a = 1383.6(3), b = 540.89(8), c = 1493.1(3) pm, = 91.65(3)°) and Ba2CaCuCr2F14 (a = 1381.1(5), b = 535.5(1), c = 1481.4(6) pm, = ...Read more >
The results of single crystal X-ray structure determinations are reported for Ba2CaCuV2F14 (a = 1383.6(3), b = 540.89(8), c = 1493.1(3) pm, = 91.65(3)°) and Ba2CaCuCr2F14 (a = 1381.1(5), b = 535.5(1), c = 1481.4(6) pm, = 91,50(4)°), both isotypic with usovite (space group C2/c, Z = 4). The resulting average distances are V-F: 193.8 pm, Cr-F: 190.7 pm, and Cu-F: 209.2 resp. 207.1 pm for the Jahn-Teller elongated [CuF6] octahedra. Within the cross-linked double chains of octahedra F-bridged trimers M-Cu-M, magnetically studied earlier, are confirmed and discussed.Read less <
English Keywords
Structure Determination
Jahn-Teller Distortion
Magnetic Trimers
Origin
Hal imported