Abstract: Potassium Di-hydrogen Phosphate (KDP), crystal is a good nonlinear optic material having Second Harmonic Generation property (SHG). These KDP crystal is grown with bimetallic dopants Nikel-Magnesium (Ni3+, Mg2+) to form Nikel-Magnesium Di-hydrogen Phosphate (NMKDP). The grown crystals were analysed for structural and optical characteristics and compared with pure KDP. FTIR analysis explains the inclusion of the metallic impurities which extends the transmission region visibly. High resolution XRD confirms the order of crystallinity of the material which is found to be superior in the pure form than the bimetallic form thereby conforming the inclusion of the bimetals. The conversion efficiency and verification of SHG generation of the grown crystals were also confirmed by Kurtz method.