A copper-deficient tetragonal phase derived from chalcopyrite CuGaS sub(2)

Direct synthesis of CuGaS sub(2) 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 CuGaS sub(2) chalcopyrite phase (I42d) and copper sulfides were fou...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2013-02, Vol.25 (8), p.1-4
Main Authors: Salak, A N, Zhaludkevich, A L, Korzun, B V, Lisenkov, A D, Zheludkevich, M L
Format: Article
Language:English
Subjects:
Chalcopyrite
Condensed matter
Copper
COPPER SULFIDE
Copper sulfides
Crystal defects
Crystallization
DEFECTS
FABRICATION
Furnaces
LATTICE DEFECTS
LATTICE PARAMETERS
PHASES
PYRITE
SULFIDES
Synthesis
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Summary:Direct synthesis of CuGaS sub(2) 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 CuGaS sub(2) chalcopyrite phase (I42d) and copper sulfides were found. In the Ga-rich part, along with a chalcopyrite phase with some Cu deficiency, a new tetragonal phase I4m2 with composition close to Cu sub(5)Ga sub(9)S sub(16) 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.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/25/8/082204