Synthesis and Magnetic Properties of β‐KVOF312. Issue 6 (23rd January 2014)

• Record Type: Journal Article
• Authors: Donakowski, Martin D.; Lu, Hongcheng; Gautier, Romain; Saha, Rana; Sundaresan, A.; Poeppelmeier, Kenneth R.
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 640:Issue 6(2014)
• Page Start: 1109
• Page End: 1114
• Publication Date: 2014-01-23
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201300576
• Languages: English
• ISSNs: 0044-2313

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The potassium vanadium oxide‐fluoride phase β‐KVOF₃ was prepared by <italic>in‐situ</italic> reduction with hydrothermal methods and characterized by single‐crystal X‐ray diffraction and magnetic susceptibility measurements. The compound is orthorhombic [space group <italic>Pnma</italic>, <italic>a</italic> = 7.1596(2) Å, <italic>b</italic> = 7.5392(2) Å, <italic>c</italic> = 13.0506(4) Å, <italic>Z</italic> = 8]. The material is structurally similar and isoformulaic to d¹ materials of formulae <italic>A</italic>VOF₃ (<italic>A</italic>⁺ = alkali metal, ammonium, or organic cation). Magnetic susceptibility data were successfully fit with a Heisenberg chain model. <italic>In‐situ</italic> 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.</p> </abstract>