Synthesis and Magnetic Properties of β-KVOF3

Donakowski, Martin D. ; Lu, Hongcheng ; Gautier, Romain ; Saha, Rana ; Sundaresan, A. ; Poeppelmeier, Kenneth R. (2014) Synthesis and Magnetic Properties of β-KVOF3 Zeitschrift fur Anorganische und Allgemeine Chemie, 640 (6). pp. 1109-1114. ISSN 0044-2313

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The potassium vanadium oxide-fluoride phase β-KVOF3 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 d1 materials of formulae AVOF3 (A+ = alkali metal, ammonium, or organic cation). Magnetic susceptibility data were successfully fit with a Heisenberg chain model. In-situ reduction of V5+ to V4+ 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 d0 vanadium species to obtain a material with magnetic behavior.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons, Inc.
ID Code:120022
Deposited On:21 Jun 2021 14:10
Last Modified:22 Sep 2021 10:16

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