ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
The preparation of Tl2O and its crystal structure is discussed. By FOURIER methods for a monoclinic unit cell(aM = 6.082, bM = 3.520, cM = 13.24 Å, β = 108.2°, Z = 4, space group C2h3) the determined atomic parameters can be transformed into the trigonal system by the assumption of special oxygen positions (space group No. 166-R3m). Correspondingly the Tl2O crystal structure may be described as a threefold polytype form of the anti CdJ2 type (aH = 3,516 cH = 37.84 Å; c/a = 10.76, Z = 6, mol. vol. = 40.7 cm3; dx = 10.44, dpyk = 10.4 g m-).
Notes:
Es wird erneut über die Darstellung von Tl2O und erstmalig über dessen Kristallstruktur berichtet. Die mit Hilfe von FOURIER-Methoden zunächst an einer monoklinen Elementarzelle (aM = 6,082, bM = 3,520, cM = 13,24 Å, β = 108,2°, Z = 4, Raumgruppe C2h3) ermittelten Atomparameter lassen sich bei Annahme spezieller Sauerstofflagen in das hexagonal-rhomboedrische System (Raumgruppe D3d5) transformieren, wonach die Tl2O-Struktur als dreifache polytype Form vom Anti-CdJ2-Typ mit aH = 3,616, cH = 37,84 Å, c/a = 10,76, Z = 6, Molvol. = 40,7 cm3, drö = 10,44, dpyk = 10,4 g cm-3 aufzufassen ist.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19713810305
