title: Crystal growth and vibrational spectroscopic studies of the semiorganic non-linear optical crystal--bisthiourea magnesium sulphate.
abstract: The semiorganic non-linear optical crystal bisthiourea magnesium sulphate (BTMS) was grown by slow evaporation technique using water as solvent. Vibrational spectra were recorded to determine the symmetries of molecular vibrations. The observed Raman and infrared bands were also assigned and discussed. The optical transmission spectral study was carried out to test the transmitting ability of the crystal in the visible range. The second harmonic generation test of BTMS revealed the non-linear nature of the crystal. The TGA/DTA curve was also recorded for the experimental crystal.
authors.affiliation: Department of Physics, Periyar University, Salem-636 011, India. vkrishna_kumar@yahoo.com
authors.forename: V
authors.initials: V
authors.lastname: Krishnakumar
authors.forename: C
authors.initials: C
authors.lastname: Ramachandraraja
authors.forename: R S
authors.initials: RS
authors.lastname: Sundararajan
mesh_terms: D002625:Chemistry, Organic / Q000379:methods; D003460:Crystallization; D008278:Magnesium Sulfate / Q000032:analysis / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D013053:Spectrophotometry / Q000379:methods*; D013055:Spectrophotometry, Infrared / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013059:Spectrum Analysis, Raman / Q000379:methods; D013818:Thermogravimetry / Q000379:methods; D013890:Thiourea / Q000032:analysis / Q000737:chemistry*; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D008278:Magnesium Sulfate; D013890:Thiourea