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The rutile structure of Al1−xxO1−3xF1+3x, x = 0.0886

Published/Copyright: August 25, 2010
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Abstract

Al(O,F)2 crystallizes as a high temperature reaction product of fine granined Al-oxides and a PbF2-melt. The space group is that of rutile (TiO2), P42/mnm with unit cell dimensions a = 4.627 Å, c = 3.005 Å and Z = 2. The structure refinement based on 64 independent reflections and full-matrix least-squares method yielded R = 0.0195 (Rw = 0.0102). The Alanion distances are 1.982(1) Å (equatorial) and 1.980(1) Å (apical), where the distortion of the anion-octahedron is reflected by the three different anion-anion-distances 2.579(2) Å (common edge), 2.802(2) Å, 3.005(2) Å and the equitorial angles (O,F) – Al – (O,F) within the octahedron are 81.3° and 98.7° respectively.

Published Online: 2010-08-25
Published in Print: 1992

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