Growth and Characterization of Mono-Urea Oxalic Acid Crystals

T. Manju1 and P. Selvarajan2,*

1Department of Physics, Manonmaniam Sundaranar University, Abishekapatti-627 012, India

2Department of Physics, Aditanar College of Arts and Science, Tiruchendur-628 216, India

*To whom correspondence to be addressed: E-mail: [email protected]


An organic NLO material viz., mono-urea oxalic acid (MUOA) crystal was synthesized and grown as the single crystal by slow evaporation technique using the double distilled water as the solvent. The grown crystal was transparent, colourless and the size of the crystal was about 14 mm × 17 mm × 7 mmobtained within a period of 30 days. The grown crystal was subjected to various studies like XRD, microhardness, linear optical studies, SHG studies and Z-scan studies. The mono-urea oxalic acid crystals crystallize in monoclinic structure with a centrosymmetric space group. This crystal gives out SHG emission even though it is a centrosymmetric crystal. The mechanical parameters like hardness, work hardening coefficient, yield strength and stiffness constant were evaluated. UV-visible spectrum was recorded in the wavelength range of 190-1100 nm to find the linear optical parameters like transmittance, band gap, absorption coefficient and extinction coefficient. Third order NLO studies were carried out by Z-scan technique to find non-linear absorption coefficient, non-linear refractive index and non-linear susceptibility.


Crystal growth, Single crystal, XRD, NLO, Transmittance, Hardness, Z-scan, Extinction coefficient, Stiffness constant

  • Asian J. Mat. Chem. /
  •  2018 /
  •  3(3) /
  •  pp 61-67
  • DOI:10.14233/ajmc.2018.AJMC-P68