A　novel　1,2-diaminocyclohexane　(1,2-DACH)　decorated　manganese　thiostannate,　namely　MnSnS3(1,2-DACH)　(1),　has　been　solvothermally　synthesized　by　the　reaction　of　Mn(CH3COO)(2)center　dot　4H(2)O,　Sn　and　S　in　the　stoichiometric　ratio　in　1,2-DACH,　which　acted　as　an　efficient　structure-directing　agent　(SDA)　and　reactive　solvent　in　the　formation　of　the　title　compound.　Single-crystal　X-ray　diffraction　studies　revealed　that　the　title　compound　crystallizes　in　the　monoclinic　space　group　P2(1)/c　with　a　=　12.2458(7),　b　=　13.8588(7),　c　=　7.2292(4)　angstrom,　beta　=　99.460(6)degrees,　V　=　1210.20(12)　angstrom(3),　Z　=　4,　D-c　=　2.108　g　center　dot　cm(-3),　F(000)　=　748,　mu　=　3.584　mm(-1),　R　=　0.0348　and　wR　=　0.0823　(I　＞　2　sigma(I)).　The　structure　features　a　neutral　two-dimensional　(2D)　network　constructed　by　the　unsaturated　[Mn(1,2-DACH)]　complexes　interconnecting　[SnS3](n2n-)　chains　via　sharing　S.　Thermal　stability　and　optical　property　of　compound　1　were　characterized.