Publication Date:
2014-01-24
Description:
The potassium vanadium oxide-fluoride phase β-KVOF 3 was prepared by in-situ reduction with hydrothermal methods and characterized by single-crystal X-ray diffraction and magnetic susceptibility measurements. The compound is orthorhombic [space group Pnma , a = 7.1596(2) Å, b = 7.5392(2) Å, c = 13.0506(4) Å, Z = 8]. The material is structurally similar and isoformulaic to d 1 materials of formulae A VOF 3 ( A + = alkali metal, ammonium, or organic cation). Magnetic susceptibility data were successfully fit with a Heisenberg chain model. In-situ reduction of V 5+ to V 4+ during the hydrothermal reaction conditions was observed in the presence of Br – anions. The role of bromide ions in this reduction is explained and employed to reduce a d 0 vanadium species to obtain a material with magnetic behavior.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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