https://doi.org/10.1051/epjap/2013130108
Growth and characterization of urea-oxalic acid crystals by solution growth technique
1
Department of Physics, Dhanalakshmi College of Engineering, 601301 Chennai, India
2
Department of Physics, Loyola College, 600034 Chennai, India
3
Department of Physics, B.S. Abdur Rahman University, 600048 Chennai, India
4
Department of Chemistry, Dhanalakshmi College of Engineering, 601301 Chennai, India
a e-mail: skrishnanjp@gmail.com
Received:
26
February
2013
Revised:
5
September
2013
Accepted:
6
September
2013
Published online:
15
November
2013
Single crystals of urea-oxalic acid (UOA) have been grown from aqueous solution by slow evaporation technique. Single crystal X-ray diffraction analysis confirmed that the grown crystals belong to monoclinic system having space group P21/C. The presence of functional groups was confirmed by using Fourier transform infrared (FTIR) spectroscopy. Optical absorption studies show very low absorption in entire visible region and the UV cut-off is found to be around 240 nm. Thermal analysis studies were carried out using TG/DTA analysis and the grown crystal is thermally stable up to 180 °C. Dielectric constant studies confirm the ferroelectric property of the materials and very low dielectric loss reveals very high purity of the crystal.
© EDP Sciences, 2013
