A copper-deficient tetragonal phase derived from chalcopyrite CuGaS2
A copper-deficient tetragonal phase derived from chalcopyrite CuGaS2
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DOI：
10.1088/0953-8984/25/8/082204
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发表时间：
2013-02
期刊：
影响因子：
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通讯作者：
A. Salak;A. L. Zhaludkevich;B. Korzun;A. Lisenkov;M. Zheludkevich
中科院分区：
文献类型：
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作者：
A. Salak;A. L. Zhaludkevich;B. Korzun;A. Lisenkov;M. Zheludkevich
直接合成CuGaS 2从元素成分在一个两区炉导致宏观分离的富铜和富镓地区的结晶体积。在铸锭的富铜部分，近化学计量的CuGaS 2黄铜矿相（I 4 π 2 d）？>在富Ga部分，沿着有Cu亏损的黄铜矿相，出现了一个新的四方相I 4 μ m2？>其成分接近Cu_5Ga_9 S_（16），晶格参数a = 3.7777（2）<$，c = 5.2483（4）<$。得出的结论是，这种铜缺乏黄铜矿样相是不是一个有序的缺陷化合物（ODC）。与Cu-Ga-Se和Cu-Ga-Te系统相反，在基于硫的系统中，不太可能发生ODC现象。
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 ̄ 2 d ) ?> 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 ̄ m 2?> with composition close to Cu5Ga9S16 and the crystal lattice parameters a = 3.7777(2) Å, c = 5.2483(4) Å 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.