A new inorganic-organic hybrid lanthannm thioantimonate（V） with bidentate and tetradentate mixed amino ligands, namely La（teta）（en）（μ-η1,η2-SbS4） （1, teta = triethylenetetramine, en = ethylenediamine）, has been solvothermally synthesized and structurally, thermally and optically characterized. In 1, the en ligand is in situ produced by re-aggregation of teta which plays multiple roles in the reaction as ligand, reactive solvent and precursor. Single-crystal X-ray analysis reveals that 1 belongs to the orthorhombic space group P212121. Its structure features a one-dimensional organic-inorganic hybrid chain of [La（teta）（en）（μ-η1,η2-SbS4）],, constructed by alternating arrangement of μ-η1,η2-sbvs4 tetrahedron and La（teta）（en） complex. Keywords： thioantimonate, lanthanum, amino ligand, crystal structure, optical property
