Pressure-induced phase transformations in L-alanine crystals

J. Staun Olsen, Leif Gerward, P.T.C. Freire, J. Filho Mendes, F.E.A. Melo, A.G. Souza Filho

Research output: Contribution to journalJournal articleResearchpeer-review

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 languageEnglish
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number7
Pages (from-to)1641-1645
ISSN0022-3697
DOIs
Publication statusPublished - 2008

Keywords

  • Raman spectroscopy
  • organic compounds
  • phase transitions
  • X-ray diffraction
  • high pressure

Cite this

Olsen, J. S., Gerward, L., Freire, P. T. C., Mendes, J. F., Melo, F. E. A., & Souza Filho, A. G. (2008). Pressure-induced phase transformations in L-alanine crystals. Journal of Physics and Chemistry of Solids, 69(7), 1641-1645. https://doi.org/10.1016/j.jpcs.2007.12.005
Olsen, J. Staun ; Gerward, Leif ; Freire, P.T.C. ; Mendes, J. Filho ; Melo, F.E.A. ; Souza Filho, A.G. / Pressure-induced phase transformations in L-alanine crystals. In: Journal of Physics and Chemistry of Solids. 2008 ; Vol. 69, No. 7. pp. 1641-1645.
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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.",
keywords = "Raman spectroscopy, organic compounds, phase transitions, X-ray diffraction, high pressure",
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Olsen, JS, Gerward, L, Freire, PTC, Mendes, JF, Melo, FEA & Souza Filho, AG 2008, 'Pressure-induced phase transformations in L-alanine crystals', Journal of Physics and Chemistry of Solids, vol. 69, no. 7, pp. 1641-1645. https://doi.org/10.1016/j.jpcs.2007.12.005

Pressure-induced phase transformations in L-alanine crystals. / Olsen, J. Staun; Gerward, Leif; Freire, P.T.C.; Mendes, J. Filho; Melo, F.E.A.; Souza Filho, A.G.

In: Journal of Physics and Chemistry of Solids, Vol. 69, No. 7, 2008, p. 1641-1645.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Pressure-induced phase transformations in L-alanine crystals

AU - Olsen, J. Staun

AU - Gerward, Leif

AU - Freire, P.T.C.

AU - Mendes, J. Filho

AU - Melo, F.E.A.

AU - Souza Filho, A.G.

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - Raman spectroscopy

KW - organic compounds

KW - phase transitions

KW - X-ray diffraction

KW - high pressure

U2 - 10.1016/j.jpcs.2007.12.005

DO - 10.1016/j.jpcs.2007.12.005

M3 - Journal article

VL - 69

SP - 1641

EP - 1645

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 7

ER -

Olsen JS, Gerward L, Freire PTC, Mendes JF, Melo FEA, Souza Filho AG. Pressure-induced phase transformations in L-alanine crystals. Journal of Physics and Chemistry of Solids. 2008;69(7):1641-1645. https://doi.org/10.1016/j.jpcs.2007.12.005