Crystal growth, thermal, optical and microhardness studies of tris (thiourea) zinc sulphate - a semiorganic NLO material by J. Ramajothi, S. Dhanuskodi, and K. Nagarajan

Crystal Research and Technology

Cryst. Res. Technol. 39, 414 (2004) - Abstract -

Crystal growth, thermal, optical and microhardness studies of tris (thiourea) zinc sulphate - a semiorganic NLO material

J. Ramajothi, S. Dhanuskodi, and K. Nagarajan*

Department of Physics, Bharathidasan University, Tiruchirappalli – 620 024, India
*Department of Physics, Karunya Institute of Technology, Coimbatore – 641 114, India

Keywords	crystal growth, semiorganic NLO material, microhardness, birefringence
PACS	42.70Hj, 81.10Aj
DOI	10.1002/crat.200310204

Tris (thiourea) zinc sulphate (ZTS), a semiorganic nonlinear optical (NLO) material has been synthesized at 30°C. The solubility was determined in different solvents such as water, ethanol and water mixture of ethanol (1:1). Good quality single crystals with size 10 x 8 x 6 mm³ were grown by slow evaporation technique within three weeks with approximate growth rate of 0.5 mm/day. The grown crystals have been subjected to single crystal X-ray diffraction to determine the unit cell dimensions and morphology. The TGA and DTA reveal that the material has good thermal stability. The UV-Vis spectrum shows that the material has wide optical transparency in the entire visible region. The second harmonic generation was confirmed by Kurtz powder method. The birefringence of the crystal was measured in the visible region and it was found to vary with the wavelength. The microhardness test was carried out in (100) plane and the load dependent hardness was measured.

The full text of this paper in pdf-Format:

If you have come directly to this page, click this symbol

to go to the CRT homepage.