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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 374-380 
    ISSN: 0044-2313
    Keywords: Ammonium cyclooctaphosphate trihydrate ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung und Kristallstruktur von Ammoniumcyclooctaphosphattrihydrat: (NH4)8P8O24 · 3H2ODie Herstellung und Kristallstruktur von (NH4)8P8O24 · 3H2O, wird beschrieben. Es kristallisiert monoklin in der Raumgruppe Cc, Gitterkonstanten: a = 24,268(14), b = 6,700(3), c = 20,586(13) Å, β = 112,06(6)° Die Elementarzelle enthält 4 Formeleinheiten.Die Kristallstruktur wurde unter Verwendung von 4 668 unabhängigen Reflexen gelöst, der R-Wert beträgt 0,037.Die Anordnung der Ringanionen und der Ammoniumgruppen ist fast zentrosymmetrisch, während die Lage der Wassermolekühle davon abweicht. Die Ringanionen selbst zeigen eine strenge pseudozentrosymmetrische Konformation.
    Notes: Ammonium cyclooctaphosphate trihydrate, (NH4)8P8O24 · 3H2O, is monoclinic, Cc, with Z = 4 and the following unit-cell dimensions: a = 24.268(14), b = 6.700(3), c = 20.586(13) Å, β = 112,06(6)° Chemical preparation and crystal structure are reported. Using 4 668 unique reflections the atomic arrangement was determined with a final R value of 0.037. The organization of ring-anions and ammonium groups is almost centrosymmetrical but the location of the water molecules is not. The ring anion itself has a strong pseudo centrosymmetric conformation.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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