In this paper the structural characterization of grown semi organic non linear mixed optical crystals using the salt of amino acid – L-histidine mixed in equimolar proportions with HCl and HBr are presented. The crystals were developed tactfully by slow evaporation technique over a period of 25 days. Single crystal X-ray diffraction technique (SXRD) and fourier transform infrared (FTIR) spectral analysis were performed on the grown crystal to evaluate the lattice parameters and the various molecular vibration. Further, the crystal was subjected to Energy dispersive X-ray spectroscopy (EDS) analysis to assess the existence of chlorine and bromine. From the experimental results the presence of chlorine and bromine are confirmed and the mixed crystal posses orthorhombic structure with space group P212121. The second harmonic generation (SHG) in the crystals are confirmed by Kurtz powder technique and the efficiency of frequency doubling is estimated.
