K2Ag6Sn3S10: A Quaternary Sulfide Composed of Silver Sulfide Layers Pillared by Zigzag Chains [SnS3]2-

Abstract
A novel framework K(2)Ag(6)Sn(3)S(10) was synthesized solvothermally and characterized by single-crystal diffraction. The framework comprises [Ag(6)SnS(4)](2+) cationic layers pillared by [SnS(3)](2)(-) zigzag chains formed by vertex-sharing SnS(4) tetrahedra, and potassium ions are located in 1D channels. This compound crystallizes in the orthorhombic Pbcn space group with a = 24.0201(2) A, b = 6.4017(3) A, c = 13.3056(4) A, Z = 4. Its thermal and optical properties are studied.