TY - JOUR
T1 - Equation of state and shear strength at multimegabar pressures
T2 - Magnesium oxide to 227 GPa
AU - Duffy, Thomas S.
AU - Hemley, Russell J.
AU - Mao, Ho Kwang
PY - 1995
Y1 - 1995
N2 - The equation of state, elasticity, and shear strength of magnesium oxide were examined to 227 GPa using synchrotron x-ray diffraction in a diamond anvil cell. Static compression, ultrasonic elasticity, and shock data for MgO from ambient pressure to above 200 GPa can all be described by a single Birch-Murnaghan equation of state when the static shear strength, which is determined to be at least 11 GPa at 227 GPa, is taken into account. Our results show that there are significant changes in the degree and character of the elastic anisotropy of MgO at high pressure.
AB - The equation of state, elasticity, and shear strength of magnesium oxide were examined to 227 GPa using synchrotron x-ray diffraction in a diamond anvil cell. Static compression, ultrasonic elasticity, and shock data for MgO from ambient pressure to above 200 GPa can all be described by a single Birch-Murnaghan equation of state when the static shear strength, which is determined to be at least 11 GPa at 227 GPa, is taken into account. Our results show that there are significant changes in the degree and character of the elastic anisotropy of MgO at high pressure.
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U2 - 10.1103/PhysRevLett.74.1371
DO - 10.1103/PhysRevLett.74.1371
M3 - Article
C2 - 10059003
AN - SCOPUS:11944265814
SN - 0031-9007
VL - 74
SP - 1371
EP - 1374
JO - Physical review letters
JF - Physical review letters
IS - 8
ER -