Crystal Research and Technology
Cryst. Res. Technol. 41, 481 (2006) - Abstract -

Photoacoustic study of the thermal and optical properties of hippuric acid

E. Ramachandran, P. Raji*, K. Ramachandran*, and S. Natarajan*

Department of Physics, Thiruvalluvar College, Papanasam-627425, India
*School of Physics, Madurai Kamaraj University, Madurai-625021, India

Keywords gel growth, XRD, photoacoustics, hippuric acid, urinary crystal, thermal diffusivity, optical absorption, NLO
PACS 81.10.-h, 61.10Nz, 81.70Cv, 65.90.+i, 66.10.Cb, 78.20.C
DOI 10.1002/crat.200510609

Photoacoustic spectroscopy (PAS) is a recently developed, non-destructive testing (NDT) tool, used for analyzing the physical properties of materials. This method is used here to determine the thermal diffusivity and conductivity of the gel-grown single crystals of hippuric acid, a minor constituent of urinary calculi and also a non-linear optical (NLO) material. Optical absorption of the specimen was studied using its PA spectrum and compared with UV-visible absorption spectra. Second harmonic generation (SHG) conversion efficiency was also carried out. Characterization of the crystals was made using X-ray powder diffraction and density determination.




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