摘要
Reactions of Sn powder, cadmium iodide, rubidium carbonate, and sodium sulfide yielded two new compounds： three-dimensional chalcogenide Rb Na_3Cd_2Sn_2S_8（1） and layered ternary compound Na_2CdS_2（2）. 1 and 2 have been determined by single-crystal X-ray diffraction： 1 belongs to the orthorhombic space group Pca21, with a = 13.486（3）, b = 6.7310（14）, c = 18.401（4） ？ and Z = 4; 2 crystallizes in the R 3 m space group, with a = 3.718（3）, c = 26.170（4） ？ and Z = 3. Study of the yellow block shaped crystals of 1 reveals that the structure consists of tetrahedral CdS_4 and SnS_4. The {Cd_2Sn_2S_8} cluster shows a 12-numbered ring structure assembled by corner-sharing of alternating SnS_4 and CdS_4, and the rubidium and sodium ions act as void-filling and charge compensating cations. The dark orange hexagonal crystal of compound 2 consists of a unique 1$[CdS_2]^（2-） layer, which are separated by the Na＋. UV/Vis absorption spectrum exhibits the materials 1 and 2 have semiconductor properties.
Reactions of Sn powder, cadmium iodide, rubidium carbonate, and sodium sulfide yielded two new compounds： three-dimensional chalcogenide Rb Na_3Cd_2Sn_2S_8（1） and layered ternary compound Na_2CdS_2（2）. 1 and 2 have been determined by single-crystal X-ray diffraction： 1 belongs to the orthorhombic space group Pca21, with a = 13.486（3）, b = 6.7310（14）, c = 18.401（4） ？ and Z = 4; 2 crystallizes in the R 3 m space group, with a = 3.718（3）, c = 26.170（4） ？ and Z = 3. Study of the yellow block shaped crystals of 1 reveals that the structure consists of tetrahedral CdS_4 and SnS_4. The {Cd_2Sn_2S_8} cluster shows a 12-numbered ring structure assembled by corner-sharing of alternating SnS_4 and CdS_4, and the rubidium and sodium ions act as void-filling and charge compensating cations. The dark orange hexagonal crystal of compound 2 consists of a unique 1$[CdS_2]^（2-） layer, which are separated by the Na＋. UV/Vis absorption spectrum exhibits the materials 1 and 2 have semiconductor properties.
基金
supported by the National Natural Science Foundation of China(No.21461019)
