Isomorphous substitutions in Sillenite (cas 12272-31-0)-family single-crystal Bi24(M2-xMn4+x)O40 solid solutions (M = Al3+, Fe3+, Ge4+, Ti4+, Cr4+, V5+)

Add time:08/13/2019    Source:sciencedirect.com

Single-crystal sillenite-type Bi24(M2-xMn4+x)O40 (M = Al3+, Fe3+, Ge4+, Ti4+, Cr4+, V5+) solid solutions have been studied by a complex of methods: single crystal and powder X-ray diffraction; EXAFS/XANES, IR and Raman spectroscopies; scanning and transmission electron microscopies; electron probe X-ray microanalysis. Structures of Bi24(M2-xMnx)O40 (M = Al, Fe, V, Ge) solid solutions contain Mn ions with two formal charges, Mn4+ and Mn5+, as well as vacancies in the Bi (M = V) and O (M = Cr, Fe, Al, V) sites. For the Bi24(M2-xMnx)O40 (M = Fe, Cr, V), a partial occurrence of Bi atoms in the tetrahedral sites has been detected by X-ray diffraction, which was confirmed by IR and Raman spectroscopies. Two isostructural sillenite-type solid solutions based on the Bi24Mn2O40 and γ-Bi2O3 with the impurity phases Mn2O3 and Bi2Mn4O10 were found in the system with M = Cr. Limits for isomorphic substitutions in the Bi24(M2-xMnx)O40 (M = Al, Fe, Ge, Ti, Cr, V) systems were theoretically estimated and compared with the experimental results obtained. A potential of elaborated combination of methods aimed at determining the precise real composition of solid solutions not identical to that of the initial charge was demonstrated. Homogeneity regions for sillenite family phases were predicted.

We also recommend Trading Suppliers and Manufacturers of Sillenite (cas 12272-31-0). Pls Click Website Link as below: cas 12272-31-0 suppliers

Prev:Heterogeneous activation of peroxymonosulfate by Sillenite (cas 12272-31-0) Bi25FeO40: Singlet oxygen generation and degradation for aquatic levofloxacin
Next:Synthesis and optical characterization of In3+-stabilized γ-Bi2O3 Sillenite (cas 12272-31-0) semiconductor with cation deficiency)