A new compound, Pb1.13Ba7.87B18O36, has been synthesized by a solid-state reaction, and its structure was determined by single-crystal X-ray diffraction. It crystallizes in the non-centrosymmetric space group R32. The fundamental building units of Pb1.13Ba7.87B18O36 are the hexagonal B3O6 rings, which are parallel to the (001) plane and stack along the c axis. Pb1.13Ba7.87B18O36 exhibits a short-wavelength absorption onset at 210nm. Functional groups present in the sample were identified by Fourier transform infrared spectrum.