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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.