Stability of the crystal structure of L-valine under high pressure

Raman scattering measurements were carried out on a single crystal of L‐valine with the pressure increasing from the ambient value to 6.9 GPa. Sudden changes in intensity of the bands were observed in the higher energy spectral range at ∼3 GPa and ∼5.3 GPa. Discontinuities observed in the wave numbe...

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Veröffentlicht in:	Physica Status Solidi (b) 2009-03, Vol.246 (3), p.553-557
Hauptverfasser:	da Silva, J. Hermínio, Lemos, V., Freire, P. T. C., Melo, F. E. A., Filho, J. Mendes, Lima Jr, J. A., Pizani, P. S.
Format:	Artikel
Sprache:	eng
Schlagworte:	61.50.Ks 62.50.−p 78.30.Jw 82.80.Gk Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Infrared and raman spectra and scattering Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Organic compounds Organic compounds, polymers Physics Structure of solids and liquids crystallography Structure of specific crystalline solids
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Zusammenfassung:	Raman scattering measurements were carried out on a single crystal of L‐valine with the pressure increasing from the ambient value to 6.9 GPa. Sudden changes in intensity of the bands were observed in the higher energy spectral range at ∼3 GPa and ∼5.3 GPa. Discontinuities observed in the wave number vs. pressure plots occurred in the complete spectrum at those same pressures, suggesting changes in the crystal structure. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:	0370-1972 1521-3951
DOI:	10.1002/pssb.200880523