Abstract
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. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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