Thermal and mechanical properties of a complex nonlinear optical material:cadmium mercury thiocyanate crystal

The data of the thermal expansion and specific heat of cadmium mercury thio cyanate crystal have been obtained. The specific heat is 0.7588 J/g.degrees C at room temperature. The thermal expansion occurs in the direction paral lel to the c-axis, and the thermal contraction occurs in the direction para llel to the a-axis. The thermal expansion is the same as the thermal contra ction at 353 K. The relationship between thermal properties and crystal str ucture is discussed.