TY - JOUR
T1 - Synchrotron x-ray powder diffraction study of natural P2/n-omphacites at high-pressure conditions
AU - Pavese, A.
AU - Diella, V.
AU - Levy, D.
AU - Hanfland, M.
PY - 2001
Y1 - 2001
N2 - Synchrotron X-ray powder diffraction experiments at high pressure conditions (0.0001-13 GPa) were performed at ESRF (Grenoble-F), on the beamline ID9, to investigate the bulk elastic properties of natural P2/n- omphacites, with quasi-ideal composition. The monoclinic cell parameters a, b, c and β were determined as a function of pressure, and their compressibility coefficients are 0.00277(7), 0.00313(8), 0.00292(5) and 0.00116(4) GPa-1, respectively. The third-order BirchMurnaghan equation of state was used to interpolate the experimental P - V data, obtaining Ko = 116.6 (±2.5) GPa and K1o = 6.03 (±0.60). Ko was also determined by means of the axial and angular compressibilities [122.5(±1.7) GPa], and of the finite Lagrangian strain theory [121.5(±1.0) GPa]. The discrepancies on Ko are discussed in the light of a comparison between techniques to determine the bulk modulus of crystalline materials from static compression diffraction data.
AB - Synchrotron X-ray powder diffraction experiments at high pressure conditions (0.0001-13 GPa) were performed at ESRF (Grenoble-F), on the beamline ID9, to investigate the bulk elastic properties of natural P2/n- omphacites, with quasi-ideal composition. The monoclinic cell parameters a, b, c and β were determined as a function of pressure, and their compressibility coefficients are 0.00277(7), 0.00313(8), 0.00292(5) and 0.00116(4) GPa-1, respectively. The third-order BirchMurnaghan equation of state was used to interpolate the experimental P - V data, obtaining Ko = 116.6 (±2.5) GPa and K1o = 6.03 (±0.60). Ko was also determined by means of the axial and angular compressibilities [122.5(±1.7) GPa], and of the finite Lagrangian strain theory [121.5(±1.0) GPa]. The discrepancies on Ko are discussed in the light of a comparison between techniques to determine the bulk modulus of crystalline materials from static compression diffraction data.
KW - Bulk elastic
KW - Lagrangian strain theory
KW - Omphacites
KW - Properties
UR - http://www.scopus.com/inward/record.url?scp=0034915367&partnerID=8YFLogxK
U2 - 10.1007/s002690000128
DO - 10.1007/s002690000128
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AN - SCOPUS:0034915367
SN - 0342-1791
VL - 28
SP - 9
EP - 16
JO - Physics and Chemistry of Minerals
JF - Physics and Chemistry of Minerals
IS - 1
ER -