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

doi:10.1016/j.jpcs.2007.12.005

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 journal › Journal article › Research › peer-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 language	English
Journal	Journal of Physics and Chemistry of Solids
Volume	69
Issue number	7
Pages (from-to)	1641-1645
ISSN	0022-3697
DOIs	https://doi.org/10.1016/j.jpcs.2007.12.005
Publication status	Published - 2008

Keywords

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

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title = "Pressure-induced phase transformations in L-alanine crystals",

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",

author = "Olsen, {J. Staun} and Leif Gerward and P.T.C. Freire and Mendes, {J. Filho} and F.E.A. Melo and {Souza Filho}, A.G.",

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doi = "10.1016/j.jpcs.2007.12.005",

language = "English",

volume = "69",

pages = "1641--1645",

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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 -

Pressure-induced phase transformations in L-alanine crystals

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