Solvothermal syntheses and structures of A3AgSn3Se8 (A=Rb, K)

Abstract Two new compounds A 3 AgSn 3 Se 8 (A = K, Rb) were synthesized solvothermally and characterized by X-ray single crystal diffraction. These compound are composed of building block [Sn 3 Se 8 ] 4− formed by three edge-sharing SnSe 4 tetrahedra, and these building blocks are further connected by tetrahedral coordinated Ag + to form infinite chains, alkali cations are located between the chains. Their optical properties were also studied.