Abstract
Raman scattering and synchrotron X-ray diffraction have been used to investigate the high-pressure behavior of L-alanine. This study has confirmed a structural phase transition observed by Raman scattering at 2.3 GPa and identified it as a change from orthorhombic to tetragonal structure. Another phase transformation from tetragonal to monoclinic structure has been observed at about 9 GPa. From the equation of state, the zero-pressure bulk modulus and its pressure derivative have been determined as (31.5 +/- 1.4) GPa and 4.4 +/- 0.4, respectively.
Original language | English |
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Journal | Journal of Physics and Chemistry of Solids |
Volume | 69 |
Issue number | 7 |
Pages (from-to) | 1641-1645 |
ISSN | 0022-3697 |
DOIs | |
Publication status | Published - 2008 |
Keywords
- Raman spectroscopy
- organic compounds
- phase transitions
- X-ray diffraction
- high pressure