Ag1.75InSb5.75Se11: A new noncentrosymmetric compound with congruent-melting behavior

作者：Hao, Wenyu; Han, Yemao; Huang, Rongjin; Feng, Kai; Yin, Wenlong; Yao, Jiyong^*; Wu, Yicheng

来源：Journal of Solid State Chemistry, 2014, 218: 196-201.

DOI：10.1016/j.jssc.2014.06.026

• Selenides
• Synthesis
• Crystal structure
• Congruent-melting

A new type of quaternary selenide Ag1.75InSb5.75Se11 has been synthesized. It crystallizes in the noncentrosymmetric space group Cm of monoclinic system, with a=13.419 (1) angstrom, b=4.084 (1) angstrom, and c=19.165 (2) angstrom, Z=2. The compound has a new three-dimensional layer structure which consists of infinite (2)(infinity) [AgSb2Se4] layers and (2)(infinity)[Ag1(Sb6)Ag3InSb(3)Se(8)] layers. The band gap of Ag17.5InSb5.75Se11 is 0.94(2) eV, which agrees with its dark gray color. Moreover, the compound exhibits congruent-melting behavior.

• 出版日期2014-10
• 单位中国科学院理化技术研究所; 中国科学院大学