Kurt O. Klepp,
"Darstellung und Kristallstruktur von NaCu3Te2"
, in Zeitschrift für Naturforschung B: A Journal of Chemical Sciences, 4-1986, ISSN: 0932-0776, K.O. Klepp: Darstellung und Kristallstruktur von NaCu3Te2, Z. Naturforsch. 42b (1987) 130
Original Titel:
Darstellung und Kristallstruktur von NaCu3Te2
Sprache des Titels:
Deutsch
Original Kurzfassung:
The title compound was prepared by reacting a corresponding mixture of Na2Te2, copper and tellurium at 700?C. NaCu3Te2 forms crystals of metallic lustre which are rapidly decomposed in humid atmosphere. It crystallizes with a rhombohedral structure, space group R3m, with a=4.276(3)Ä, c=23.78(1)Ä, Z=3. The crystal structure was determined from diffractometer data and refined to a conventional R of 0.050 for 135 independent reflections.
The atomic arrangement of NaCu3Te2 is based upon a c.c.p. array of tellurium atoms with stacking sequence c6. Na and Cu occupy alternatingly the interstitial layers. Na is in an octahedral coordination (d(Na-Te): 3.22Ä), the Cu atoms occupy the tetrahedral and the octahedral voids. They are, however, shifted from the centers of these sites, resulting in an 1+3 coordination (d(Cu-Te): 2.70Ä) for Cu on the tetrahedral, and an essentially trigonal coordination (d(Cu-Te): 2.575Ä) for Cu on the octahedral site.
NaCu3Te2 shows no closer structural relationships to the other alkali-copper-chalcogenides known so far. However, its crystal structure may be interpreted as an ordered defect derivate structure of the CaCu4P2-type.
Sprache der Kurzfassung:
Englisch
Englischer Titel:
Preparation and Crystal Structure of NaCu3Te2
Journal:
Zeitschrift für Naturforschung B: A Journal of Chemical Sciences
Erscheinungsmonat:
4
Erscheinungsjahr:
1986
Notiz zum Zitat:
K.O. Klepp: Darstellung und Kristallstruktur von NaCu3Te2, Z. Naturforsch. 42b (1987) 130
ISSN:
0932-0776
Anzahl der Seiten:
5
Publikationstyp:
Aufsatz / Paper in sonstiger referierter Fachzeitschrift
Forschungs-