X-ray diffraction and Raman study of dl-alanine at high pressure: Revision of phase transitions
(2012) Acta crystallographica. Section B, Structural science — Vol. 68, n° 4, p. 412-423 (2012)
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- Abstract
- The effect of pressure on dl-alanine has been studied by X-ray powder diffraction (up to 8.3 GPa), single-crystal X-ray diffraction and Raman spectroscopy (up to ∼6 GPa). No structural phase transitions have been observed. At ∼1.5-2 GPa, cell parameters b and c become accidentally equal to each other, but the space-group symmetry does not change. There is no phase transition between 1.7 and 2.3 GPa, contrary to what has been reported earlier [Belo et al. (2010). Vibr. Spectrosc. 54, 107-111]. The presence of the second phase transition, which was claimed to appear within the pressure range from 6.0 to 7.3 GPa (Belo et al., 2010), is also argued. The changes in the Raman spectra have been shown to be continuous in all the pressure ranges studied. © 2012 International Union of Crystallography Printed in Singapore - all rights reserved.
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Institute of Solid State Chemistry and Mechanochemistry Reactivity of solids
Citations
Tumanov, N., & Boldyreva, E. V. (2012). X-ray diffraction and Raman study of dl-alanine at high pressure: Revision of phase transitions. Acta crystallographica. Section B, Structural science, 68(4), 412-423. https://doi.org/10.1107/S0108768112028972 (Original work published 2012)