Title of article :
Ba2.1Bi0.9(O, F)6.8−δ: A new ordered anion-excess fluorite
Author/Authors :
Prituzhalov، نويسنده , , V.A. and Abakumov، نويسنده , , A.M. and Ardashnikova، نويسنده , , E.I. and Dolgikh، نويسنده , , V.A. and Van Tendeloo، نويسنده , , G.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Abstract :
The anion-excess ordered fluorite-related phase Ba2.1Bi0.9(O, F)6.8−δ has been synthesized by a solid state reaction of BaF2, BiF3 and Bi2O3 at 873 K with subsequent short annealing at 573 K. The crystal structure of the new phase has been solved using electron diffraction and X-ray powder diffraction (a = 9.5372(1) Å, c = 18.1623(3) Å, space group I4/m, RI = 0.025, RP = 0.029). Interstitial anions in the fluorite-based structure are considered to form isolated cuboctahedral 8:12:0 clusters. The structural relationship between the oxyfluoride phase Ba2.1Bi0.9(O, F)6.8−δ and similar rare-earth-based fluorides is discussed.
Keywords :
A. Fluorides , D. Crystal structure , C. X-ray diffraction , C. Electron diffraction
Journal title :
Materials Research Bulletin
Journal title :
Materials Research Bulletin
