Bi2La4O9, a monoclinic phase in the system Bi2O3-La2O3

• Verfasst von: Chen, Xiaolong [VerfasserIn]
• Verfasst von: Eysel, Walter [VerfasserIn]
• Verfasst von: Li, J. Q. [VerfasserIn]
• Titel: Bi2La4O9, a monoclinic phase in the system Bi2O3-La2O3
• Verf.angabe: X.L. Chen, W. Eysel, J.Q. Li
• Jahr: 1996
• Umfang: 5 S.
• Fussnoten: Elektronische Reproduktion der Druck-Ausgabe 25. Mai 2002 ; Im Titel sind die Zahlen 2, 3, 4 und 9 tiefgestellt ; Gesehen am 13.12.2022
• Titel Quelle: Enthalten in: Journal of solid state chemistry
• Ort Quelle: Orlando, Fla. : Academic Press, 1969
• Jahr Quelle: 1996
• Band/Heft Quelle: 124(1996), 2, Seite 300-304
• DOI: doi:10.1006/jssc.1996.0240
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1826891471

Abstract

The binary system Bi2O3-La2O3with La2O3≥ 50 mole% has been investigated at 950-1000°C. The results revealed three compounds: Bi8La10O27, Bi2.4La3.6O9, and Bi2La4O9. Bi2.4La3.6O9has a rhombohedral subcell with hexagonal lattice parametersa= 3.96017(5) Å,c= 9.9691(2) Å, and space groupR3m. It is probably the same phase which was reported previously as Bi2La4O9(Refs. 5 and 6). Bi2La4O9has a monoclinic structure with the subcell lattice parametersa= 6.8290(3) Å,b= 3.9887(1) Å,c= 4.0524(1) Å and β = 125.094(3)° and subcell space groupC2/m. Its average structure has been determined by X-ray powder diffraction and refined by the Rietveld method. The average structure can be described as an oxygen deficient fluorite structure of the δ-Bi2O3type with La and Bi randomly distributed on the cation site. In addition, a superstructure has been observed by TEM.