A　novel　heterometallic　organotin-oxo　cluster　(BuSn)4Ga2Mn2O6(SeO3)6　has　been　prepared　by　a　hydrothermal　reaction　and　its　structure　was　determined　by　single-crystal　X-ray　diffraction.　Such　discrete　butyltin-oxo　selenide　cluster　doped　with　two　cationic　metals　(Ga　and　Mn)　has　a　narrow　band-gap　and　shows　promise　for　photocurrent　conversion.　Solid　state　variable　temperature　fluorescence　spectra　show　the　increased　intensity　and　the　blue-shift　of　the　maximum　emission　peak　from　435　to　430　nm　with　decreasing　temperature.　The　doped　transition　metal　endows　the　compound　with　ferromagnetic-like　behavior.　©　2022　Elsevier　B.V.