A potential, semiorganic nonlinear optical (NLO) crystal , catena – Poly [[cadmium (II) ] – μ – β – alanine – di – μ – chloro], has been grown by slow evaporation technique at 35°C. The Powder X – Ray Diffractogram of the crystal has been recorded and the various planes of reflection are identified. The compound crystallizes under orthorhombic system with space group Pna2₁and the lattice parameters are: a = 6.9664Å, b = 12.9222 Å, c = 7.9546 Å and α = β = γ = 90°. The qualitative analysis on the crystal has been carried by using Fourier Transform Infrared (FTIR) and Fourier Transform Raman spectral measurements. The coordination between cadmium chloride and amino acid is confirmed by the FTRaman spectrum. Optical behaviour such as UV – visible – NIR absorption spectra and second harmonic generation (SHG) for the crystal were investigated. The UV – Visible – NIR absorption spectrum establishes that the crystal acts as a good transmittance window and its lower cutoff is found to be as low as 200 nm, allowing for frequency conversion down to UV region. The SHG conversion efficiency is nearly equal to that of KDP crystal. The thermal stability of the crystal was analyzed with the aid of Thermogravimetric analysis (TGA) and Differential Scanning Calorimetry (DSC).

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