Effect of Cyclohexylamine on growth, structural, spectral, optical and mechanical properties of potassium acid phthalate (KAP) single crystal

In the present investigation, single crystals of cyclohexylamine (CHA) doped potassium acid phthalate (KAP) were grown from aqueous solutions by slow evaporation solution technique method at 35 degrees C temperature. From the structural investigation the change in powder X-ray diffraction intensity patterns was observed due to doping influence and it shows the lattice distortion within resolution limit and confirms that there is no extra phase. The modes of vibration in the crystalline molecules have been identified by FTIR and Raman analysis. Optical transparency of doped crystals were analyzed by allowing the UV-Vis-NIR ray of wavelength between 200 and 1000 nm, which is passes through the grown KAP and CHA doped KAP crystals and the results confirm that doped KAP single crystals shows good transparency in the entire visible region, which is suitable for optical device applications. Mechanical behaviour of pure and doped KAP crystals has been investigated by Vickers microhardness analyzer and hardness parameters have been discussed.