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Calcium-free Solid Solutions in the System Ba7F12Cl2−xBrx (x<1.5), a Single-component White Phosphor Host

Penhouet, T. ; Hagemann, H. ; Kubel, F. ; Rief, A.

In: Journal of Chemical Crystallography, 2007, vol. 37, no. 7, p. 469-472

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    Title
    • Calcium-free Solid Solutions in the System Ba7F12Cl2−xBrx (x<1.5), a Single-component White Phosphor Host
    Author
    • Penhouet, T.. Département de Chimie Physique, Université de Genève, 30, quai E. Ansermet, 1211, Geneva, Switzerland
    • Hagemann, H.. Département de Chimie Physique, Université de Genève, 30, quai E. Ansermet, 1211, Geneva, Switzerland
    • Kubel, F.. Inst. für Chemische Technologie und Analytik, TU Wien, Getreidemarkt 9/164, 1060, Vienna, Austria
    • Rief, A.. Inst. für Chemische Technologie und Analytik, TU Wien, Getreidemarkt 9/164, 1060, Vienna, Austria
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Journal of Chemical Crystallography, 2007, vol. 37, no. 7, p. 469-472. Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:319746
    Summary
    We have recently prepared solid solutions of Ba∼6.3Ca∼0.7F12Cl2−xBrx with x ranging from 0 to 2. In this work, the synthesis and single crystal X-ray structure of calcium-free crystals of Ba∼6.9Na∼0.2F12Br0.6Cl1.4 (space group P63/m, a=10.6024(10), c=4.2034(4)Å), Ba∼6.9Na∼0.2F12Br1.4 Cl0.6 (space group P63/m, a=10.6155(9), c=4.2355(4)Å) and Ba∼6.9Na∼0.2Br1.32Cl0.68F12 (space group P63/m, a=10.6218(9), c=4.2284(4)Å) are reported. These crystals systematically present additional electron density at the 0 0 0.25 position which is associated with the presence of small, but significant amounts of Na+ ions in the crystal