ChemInform Abstract: Reduction of Magnesium Orthovanadate Mg₃(VO₄)₂.

Abstract

structure structure (solids and liquids) D 2000 -025Reduction of Magnesium Orthovanadate Mg 3 (VO 4 ) 2 .-A single crystal of orthorhombic Mg 3 V 2 O 8 (cation-deficient-spinel structure) is transformed into cubic Mg 3 V 2 O 6 (space group Fd-3m, Z = 8) at 560 • C in 7% H 2 /N 2 . Polycrystalline Mg 3 V 2 O 6 can be readily reoxidized to Mg 3 V 2 O 8 in air or oxygen at 500 • C. Single crystal X-ray diffraction analysis shows that Mg 3 V 2 O 6 has a spinel structure with an excess of cations (cation-stuffed-spinel structure). -(WANG, X.; ZHANG, H.; SINKLER, W.; POEPPELMEIER, K. R.; MARKS, L. D.; J. Alloys Compd. 270 (1998) 1-2, 88-94; Dep. Chem., Northwest. Univ., Evanston, IL 60208, USA; EN)