ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
News on Pentafluoro Metallates(III), SrNiF5, BaNiF5, BaCoF5, and CdCoF5Samples of BaNiF5 and for the first time SrNiF5 have been prepared by pressure fluorination (monel-autoclaves, pF2 = 50 bar, 400°C, 48 h and pF2 = 20-30 bar, 420 ± 30°C, 4 d, respectively). On the other side BaCoF5 and CdCoF5 are obtained by heating in a diluted stream of F2.Crystal data are BaNiF5: light grey-violet, orthorhombic, a = 987.3(1), b = 547.19(6), c = 743.87(8) pm; SrNiF5; dark-brown, BaGaF5-type of structure, a = 1 326.5(2), b = 544.04(6), c = 492.69(5) pm; BaCoF5: light blue, orthorhombic, a = 1 392.2(2), b = 562.01(7), c = 496.50(6) pm; CdCoF5: light blue, a = 878.7(2), b = 641.01(8), c = 749.5(2) pm, β = 115.27(2)°, CaCrF5-type of structure.The Madelung Part of Lattice Energy, MAPLE, of SrNiF5 and CdCoF5 is discussed.
Notes:
Durch Fluorierung unter erhöhtem Druck (Monel-Autoklav, pF2 = 50 bar, 400°C, 48 h) wurden hellgrauviolette Proben von BaNiF5 (orthorhombisch, a = 9,873(1); b = 5,4719(6); c = 7,4387(8) Å) sowie erstmals braunes (Monel-Autoklav, pF2 = 20-30 bar, 420 ± 30°C, 4 d) SrNiF5 (BaGaF5-Typ, a = 13,265(2); b = 5,4404(6); c = 4,9269(5) Å) erhalten.Dagegen entstehen hellblaue Pulver von BaCoF5 (orthorhombisch; a = 13,922(2); b = 5,6201(7); c = 4,9650(6) Å) und CdCoF5 (CaCrF5-Typ; a = 8,787(2); b = 6,4101(8); c = 7,495(2) Å, β = 115,27(2)°) bereits im verdünnten Fluorstrom.Der Madelunganteil der Gitterenergie, MAPLE, von SrNiF5 und CdCoF5 wurde diskutiert.
Additional Material:
13 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19824900113
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