Tb2Sn2O7　(TSO)　single　crystals　have　been　grown　by　the　top-seeded　solution　growth　(TSSG)　method　using　a　Na2B4O7-NaF　mixture　as　the　flux.　In　this　paper,　the　morphology　of　as-grown　TSO　crystals　is　briefly　described　and　the　valences　of　terbium　and　tin　in　crystal　were　analyzed　by　X-ray　photoelectron　spectroscopy.　The　transmission　spectrum　was　measured　in　the　wavelength　range　of　400-1600　nm　at　room　temperature　and　the　Faraday　rotation　of　a　TSO　crystal　was　investigated　at　532.　633　and　1064　nm　wavelengths　by　the　extinction　method.　Results　show　that　TSO　crystals　exhibit　typical　paramagnetism　when　the　temperature　is　above　2　K　and　have　a　larger　Verdet　constant　than　that　reported　for　TGG.　(C)　2014　Elsevier　B.V.　All　rights　reserved.