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Thermal expansion in CuAlTe 2 compound
Author(s) -
Orlova N. S.,
Bodnar I. V.
Publication year - 1987
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170221110
Subject(s) - thermal expansion , tetragonal crystal system , chemistry , atmospheric temperature range , perpendicular , chalcopyrite , lattice (music) , distortion (music) , thermal , crystallography , analytical chemistry (journal) , thermodynamics , crystal structure , materials science , geometry , copper , physics , mathematics , amplifier , optoelectronics , organic chemistry , cmos , chromatography , acoustics
The lattice parameters a and c as well as the axial thermal expansion coefficients α ⟂ and α ∥ in the CuAlTe 2 chalcopyrite‐type compound are determined as a function of temperature in the range from 80 to 650 K by a X‐ray diffractometry technique. The data obtained are used to evaluate the axial ratio c / a , the tetragonal distortion δ = 2 — c / a , the interatomic distances for CuTe and AlTe bonds and their temperature coefficients. It is found that the thermal expansion behaviour of CuAlTe 2 is similar to that of other CuB III C VI 2 compounds in having a relatively small expansivity along the c ‐axis and a large one in the perpendicular direction. When comparing the results for a series of the CuB III C VI 2 compounds (BAl, Ga, In; CS, Se, Te) it is shown that the correlations between the thermal expansion coefficients α ⟂, α ∥, α m , d δ/ dT and the tetragonal distortion δ, as well as the molar mass of the compound take place.