ISSN:
0044-2313
Keywords:
Acidic long-chain polyphosphate anion
;
hydrogen bonds
;
calcium polyphosphate
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Darstellung und Kristallstruktur von Calciumhydrogenpolyphosphat: CaH2(PO3)4Herstellung und Kristallstruktur von CaH2(PO3)4, das dritte Beispiel eines sauren Polyphosphates, werden beschrieben. Es kristallisiert monoklin in der Raumgruppe P21/c, Gitterkonstanten: a = 5,686(1), b = 9,676(4), c = 8,844(3) Å, β = 92,35(2)°. Die Elementarzelle enthält 2 Formeleinheiten.Die Kristallstruktur wurde unter Verwendung von 2 321 unabhängigen Reflexen gelöst, der R-Wert beträgt 0,017.Das Schema der Wasserstoffbrücken wird dargestellt.
Notes:
Preparation and crystal structure of an acidic polyphosphate of calcium is described. CaH2(PO3)4: monoclinic, P21/c, with Z = 2, and a = 5.686(1), b = 9.676(4), c = 8,844(3) Å, β = 92.35(2)°.The crystal structure was solved using 2 321 unique reflections with a final R value of 0.017.The compound is characterized by infinite (PO3)n chains running along c and linked together in a three-dimensional way by Ca—O and hydrogen bonds. The two-dimensional linkage of the phosphoric chains by hydrogen bonds is compared to those already observed in ErH(PO3)4 and BiH(PO3)4.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19956210330
