We present measurements of optical transmission, dispersion and first second-harmonic generation results with the newly discovered nonlinear crystal, LiRbB4O7. Sellmeier equations are constructed for the 400-700 nm spectral range, and the single nonlinear coefficient is estimated to amount to d(14) = 0.45 pm/V. (C) 2003 Elsevier B.V. All rights reserved.