Single crystals of BaNaB<sub>9</sub>O<sub>15</sub> (BaNaBO) and BaCaBO<sub>3</sub>F (BCBF) have been grown by the Czochralski pulling method in air. These compands were investigated for non linear optical applications and were expected to exhibit an extended transparency window in the ultra-violet. BaNaBO crystallizes in the non-centrosymmetric space group R3C (Z=6)<sup></sup> Cell parameters of BaNaBO are: a=11.1003(8) Å and c= 17.404(1) Å. The borate anionic network is characterised by a three-dimensional framework built up from [B<sub>3</sub>O<sub>7</sub>] rings<sup></sup>. The other compound BCBF has a hexagonal structure with P-62m space group (Z=3)<sup></sup>, its cell parameters are a=9.0489(8) Å and c=4.3257(4) Å. Its basic structural unit is [BO<sub>3</sub>]<sup></sup> group. The transmission spectras of the two crystals are reported. The refractive indices were measured by the minimum deviation technique and fitted to the Sellmeier equations. Second harmonic generation (SHG) phase matching angle calculations are presented.