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Synthesis, Crystal Structure and Vibrational Spectra of Barium Cyclotetraphosphate Hydrate Ba2(P4O12)∙3.5H2O 

Authors

  • Henning A. Höppe Dr.,

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    1. Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg im Breisgau, Germany
    • Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg im Breisgau, Germany, Fax: +49-761-203-6012
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  • Karolina Kazmierczak,

    1. Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg im Breisgau, Germany
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  • Michael Daub

    1. Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg im Breisgau, Germany
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    Supporting information for this article is available on the WWW under http://dx.doi.org/10.1002/zaac.200900447 or from the author.

Abstract

Barium tetrametaphosphate hydrate Ba2(P4O12)∙3.5H2O was synthesized as a single-phase crystalline powder starting from an aqueous solution of barium hydroxide and phosphorus pentoxide at 300 K. Ba2(P4O12)∙3.5H2O crystallizes in a new structure type in which the Ba2+ ions form a distorted hexagonal diamond-like arrangement with the (P4O12)4– anions in the trigonal prismatic voids (Ba2(P4O12)∙3.5H2O, C2/c, Z = 4, a = 777.3(2), b = 1297.6(2), c = 1346.1(3) pm, b = 95.38(2)°, wR2 = 0.071, R1 = 0.018, 1180 reflections, 118 parameters). The vibrational spectra of Ba2(P4O12)∙3.5H2O and its thermal behavior up to 720 K are also reported.

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