TY - JOUR
T1 - Elasticity of MgSiO3 orthoenstatite
AU - Jackson, Jennifer M.
AU - Sinogeikin, Stanislav V.
AU - Bass, Jay D.
PY - 1999/4
Y1 - 1999/4
N2 - The single-crystal elastic moduli of the MgSiO3 orthoenstatite end-member have been measured by Brillouin spectroscopy at ambient conditions. The aggregate elastic moduli at 1 atm are K(S) = 107.6(15) GPa and μ = 76.8(7) GPa, for the adiabatic bulk modulus and shear modulus, respectively. These values are in excellent agreement with the results of previous acoustic studies of synthetic MgSiO3. Comparison of our results with pressure-volume (P-V) measurements do not support the presence of a change in the P-V trajectory of orthoenstatite at ~4 GPa, as suggested previously on the basis of X-ray measurements to 8.5 GPa. The effects of chemical composition on the elasticity of orthopyroxenes are well represented by the variation of compressional and shear velocities with density, which exhibit well defined trends for both synthetic and natural samples.
AB - The single-crystal elastic moduli of the MgSiO3 orthoenstatite end-member have been measured by Brillouin spectroscopy at ambient conditions. The aggregate elastic moduli at 1 atm are K(S) = 107.6(15) GPa and μ = 76.8(7) GPa, for the adiabatic bulk modulus and shear modulus, respectively. These values are in excellent agreement with the results of previous acoustic studies of synthetic MgSiO3. Comparison of our results with pressure-volume (P-V) measurements do not support the presence of a change in the P-V trajectory of orthoenstatite at ~4 GPa, as suggested previously on the basis of X-ray measurements to 8.5 GPa. The effects of chemical composition on the elasticity of orthopyroxenes are well represented by the variation of compressional and shear velocities with density, which exhibit well defined trends for both synthetic and natural samples.
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U2 - 10.2138/am-1999-0421
DO - 10.2138/am-1999-0421
M3 - Article
AN - SCOPUS:0032870354
SN - 0003-004X
VL - 84
SP - 677
EP - 680
JO - American Mineralogist
JF - American Mineralogist
IS - 4
ER -