Abstract
Raman scattering of L-asparagine: Cr3+ was studied over the complete
range of wavenumbers at temperatures from ambient to similar to 410 K. A
qualitative change in the spectrum occurs when the temperature
approaches 400 K. In the region of the spectrum corresponding to lattice
vibrations of the crystal some bands disappear, as they do in the
intermediate range of wavenumbers 200 cm(-1) < nu < 1000 cm-1, where
some new peaks also appear. Similar changes also occur in the highest
spectral region, for wavenumbers >3000 cm(-1), which is associated with
water molecule vibrations. The changes indicate a modification of the
crystal structure with irreversible loss of water molecules during the
heating process. Copyright (C) 2006 John Wiley & Sons, Ltd.
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