Calculation of Mechanical Parameters of Thiourea Single crystals Grown by Inexpensive Slow Evaporation Technique

Single crystals of Thiourea(NH2CSNH2), an organic nonlinear optical material have been grown by simple and inexpensive slow evaporation technique at room temperature. The mechanical characterization of grown crystals were studied and their Vicker’s Micro hardness number (Hv), Fracture toughness (Kc), Elastic stiffness constant (C11) and yield strength (σ) were calculated. Standard hardness value K1 and K2 were calculated using Meyer’s law and Kick’s law.