Crystal structure of Сu2–m Te (m = 0.25)

The Сu2Te compound has been synthesized by alloying Сu and Te taken in stoichiometric ratios. A Сu2Te sample has been homogenized by annealing at 773 K for 100 h. A pure copper phase in the form of thin filaments is found to segregate from the synthesized product (4 g) by the end of annealing. It is...

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Bibliographic Details
Published in:Crystallography reports 2017-03, Vol.62 (2), p.210-214
Main Authors: Amiraslanov, I. R., Alieva, N. A., Guseinov, G. G., Agamirzoeva, G. M.
Format: Article
Language:English
Subjects:
Annealing
Coordination numbers
Copper
Crystal structure
Crystallization
Filaments
Lattice parameters
Rietveld method
Synthesis
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Summary:The Сu2Te compound has been synthesized by alloying Сu and Te taken in stoichiometric ratios. A Сu2Te sample has been homogenized by annealing at 773 K for 100 h. A pure copper phase in the form of thin filaments is found to segregate from the synthesized product (4 g) by the end of annealing. It is established by X-ray diffraction analysis that the copper-deficient sample is crystallized into the trigonal system with lattice parameters а = 8.328(1) Å, с = 7.196(1) Å, V = 432.2(1) Å3, sp. gr. P 3 ¯ m 1 , Z = 8. The crystal structure is determined and the sample composition Сu2–mTe (m = 0.25) is refined by the Rietveld method. The three independent copper atoms in the lattice are found to have different coordination numbers: 3, 4, and 5.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774517020031