ISSN:
0947-6539
Schlagwort(e):
cadmium
;
clusters
;
layered compounds
;
semiempirical calculations
;
thallium
;
Zintl phases
;
Chemistry
;
General Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The compound K14Cd9Tl21 has been prepared by fusion of the elements in a tantalum reactor followed by slow cooling at the rate of 6° per hour to enable crystal growth. The X-ray crystal structure (hexagonal, P2m; a = 9.884(3), c =17.173(5) Å; Z = 2) was refined to reliability factors of R1 = 5.09, wR2 = 11.64%. The anionic substructure contains both isolated clusters of Tl7-11 and a layered network based on Cd5Tl2 pentagonal bipyramids. The structure-electron count relationship for the Tl7-11 cluster was analyzed in detail. The Cd9Tl7-10 layers are found to confer metallic properties to the material, and the bonding within such layers is found to be highly delocalized.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/chem.19970030520
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