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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 608 (1992), S. 135-144 
    ISSN: 0044-2313
    Keywords: Calcium bromate, iodate; ; X-ray ; IR ; Raman ; thermal analyses ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Calcium Bromated and Iodates - Crystal Structure, X-Ray, IR and Raman Spectroscopical and Thermoanalytical InvestigationsThe phase relationships (and both decomposition and disproportionation)of bromates and iodates of alkaline earth metals are studied by means of thermal analyses (DTA, DSC, TG) and (high-temperature) X-Ray, IR-, and (high-temperature) Raman spectroscopic measurements. The following compounds have been established: Ca(IO3)2 · 6 H2O oF216, the isotypic Ca(BrO3)2 · H2O and Ca(IO3)2 · H2O mP48, Ca(IO3)2 I (Lautarit) mP36, Ca(IO3)2 II and Ca(BrO3)2. The Crystal structure of Ca(IO3)2 · H2O (brüggenite) (space group P21/c, Z = 4) has been determined by single crystal X-ray diffraction (MoKα). The final R value for 3888 reflections with Io 〉 3σ1 is 0.0487. The structures of bromates and iodates of alkaline earth metals known so far are discussed with respect to the energetic (mode frequencies) and geometric (bond lengths) distortion of the XO3-ions as well as the strengths of H-bonds present in the respective hydrates.
    Notes: Ca(BrO3)2 und Ca(IO)3 sowie deren Hydrate wurden mit Hilfe thermoanalytischer, röntgenographischer und IR- sowie Raman- spektroskopischer Methoden untersucht. Charakterisiert wurden: Ca(IO3)2 · 6 H2O oF216, die isotypen Monohydrate mP48 Ca(BrO3)2 νH2O und Ca(IO3)2 I (Lautarit) mP36, Ca(IO3)2 II und Ca(BrO3)2. Die Kristallstruktur von Ca(IO3)2 νH2O (Brüggenit) (Raumgruppe P21/c, Z = 4) wurde mit Hilfe von Röntgeneinkristalldaten (MoKα) bestimmt (R = 4,87%, 3888 Reflexe mit Io 〉 3σ1). Die Strukturen der bisher bekannten Halogenate von Erdalkalimetallen werden im Hinblick auf die energetische (Schwingungsfrequenzen) und geometrische (Bindungslängen) Verzerrung der XO3--Ionen sowie der Stärke der Wasserstoffbrücken diskutiert.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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