Single crystals of SrB(C6H5O7)2(H2O)4.3H2O, a new borate-citrate material, were grown with sizes up to 8X6X2 mm by slow evaporation of water at room temperature. The structure of SrB(C6H5O7)2(H2O)(4).3H2O was determined by single-crystal X-ray diffraction. It crystallizes in the monoclinic space group P21/c, with a = 11.363(3) angstrom, b = 18.829(4) angstrom, c = 11.976(3) angstrom, beta = 110.736(3)degrees, and Z = 4. The SrO8 dodecahedra, BO4 tetrahedra and citrate groups are linked together to form chains. The compound was characterized by IR and UV/Vis/NIR transmittance spectroscopy as well as thermal analysis.