Synthese et structure cristalline d'un nouvel oxyde mixte “FeV3O8” () |
| |
Authors: | J Muller JC Joubert M Marezio |
| |
Institution: | Laboratoire de Cristallographie, C.N.R.S. 166X, 38042 Grenoble Cedex-France |
| |
Abstract: | Single crystals of a new oxide “FeV3O8” () have been synthesized by slowly cooling a melted mixture with the composition, 8VO2, 3V2O5, Fe2O3. The chemical formula has been determined by electron microprobe analysis. The compound, isostructural with AlNbO4 and VO2(B), has a monoclinic symmetry, space group ; the unit cell dimensions are a = 12.13Å, b = 3.679 Å, c = 6.547 Å, β = 106.85°. A structural refinement based on single crystal data has been carried out. It gave an R-factor of 1.9%. This refinement indicated that the iron and vanadium cations are partially ordered, although the average cation-oxygen distances for the two six-coordinated cations were exactly the same (1.961 Å). This conjecture was supported by the calculation of the cation valences. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|