X-ray investigation of copper selenides Cu2−xSe (2.00≥2-x≥1.72)
X-ray investigation of copper selenides Cu2−xSe (2.00≥2-x≥1.72)
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DOI：
10.1107/s0021889875010722
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发表时间：
1975-06
影响因子：
6.1
通讯作者：
A. Tonejc;Z. Ogorelec;B. Mestnik
中科院分区：
文献类型：
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作者：
A. Tonejc;Z. Ogorelec;B. Mestnik
计算了FCC的晶格参数和晶格热膨胀的线性系数。用德拜-谢勒X射线衍射法测定了β-Cu2-−xSe(1.86≥2−x≥1.72)在25-336℃温度范围内的热膨胀系数，讨论了热膨胀系数随温度的变化规律。此外，还重新测定了非化学计量比Cu2-−-xSe化合物(2.00≥2−x≥1.72)区域的铜-硒体系的平衡相图，并特别考虑了FCC的均一范围。β-Cu2−XSE，并与以前发表的结果进行了比较。
The lattice parameters and the linear coefficient of the lattice thermal expansion of f.c.c. β-Cu2−xSe (1.86 ≥ 2−x ≥ 1.72) were determined by means of the Debye–Scherrer X-ray diffraction technique in the temperature range 25–336°C. The concentration and temperature dependence of the coefficient of thermal expansion are discussed. In addition the equilibrium phase diagram of the Cu–Se system in the region of a non-stoichiometric Cu2−xSe compound (2.00 ≥2−x ≥1.72) was redetermined, with special consideration of the homogeneity range of the f.c.c. β-Cu2−xSe, and compared with previously published results.