A copper-deficient tetragonal phase derived from chalcopyrite CuGaS2
authors Salak, AN; Zhaludkevich, AL; Korzun, BV; Lisenkov, AD; Zheludkevich, ML
nationality International
journal JOURNAL OF PHYSICS-CONDENSED MATTER
abstract Direct synthesis of CuGaS2 from elemental ingredients in a two-zone furnace resulted in a macroseparation of Cu-rich and Ga-rich regions over the crystallization volume. In the Cu-rich parts of the ingot, a near-stoichiometric CuGaS2 chalcopyrite phase. (I (4) over bar 2d) and copper sulfides were found. In the Ga-rich part, along with a chalcopyrite phase with some Cu deficiency, a new tetragonal phase I (4) over bar m2 with composition close to Cu5Ga9S16 and the crystal lattice parameters a = 3.7777(2) angstrom, c = 5.2483(4) angstrom was revealed. It was concluded that this Cu-deficient chalcopyrite-like phase is not an ordered defect compound (ODC). As opposed to the systems Cu-Ga-Se and Cu-Ga-Te, in a system based on sulfur, the ODC phenomenon is unlikely to occur.
publisher IOP PUBLISHING LTD
issn 0953-8984
year published 2013
volume 25
issue 8
digital object identifier (doi) 10.1088/0953-8984/25/8/082204
web of science category Physics, Condensed Matter
subject category Physics
unique article identifier WOS:000314780400004
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