Solvothermal Synthesis and Characterization of Sheet Structure Containing Adamantane [Hg_2Sn_2S_（10）]~（8-） Anions

Sheet Rb2HgSnS4 was synthesized solvothermally and characterized by X-ray single crystal diffraction. The compound is comprised of sheets with admantane-like [Hg2Sn2S10]8– units. The crystals belong to the space group C2/c, with the unit cell parameters a=1.1063（2） nm, b=1.1071（2） nm, c=1.5741（3） nm, a=90o, β=100.13（3）o, γ=90o. A reflectance spectroscopy study reveals the nature of the semiconductor with an energy of 2.1 eV for the compound.