  Large size single crystals of bis(thiourea)zinc(II) chloride (BTZC), a
potential nonlinear optical material, have been grown successfully by the
Sankaranarayanan Ramasamy (SR) method. Powder X-ray diffraction and Fourier
transform infrared analyses confirmed the material of the grown crystal.
Thermal stability was assessed by the thermogravimetric differential thermal
analysis. The high-resolution X-ray diffraction and dielectric measurements
indicate that the crystal grown by the SR method has good crystalline
perfection and low density of defects.
