Equation of state and strength of natural majorite
作者： A. Kavner , S. V. Sinogeikin , Raymond Jeanloz , J. D. Bass
DOI: 10.1029/1999JB900374
关键词: Mineralogy 、 Thermodynamics 、 Heat transfer 、 Transition zone 、 Brillouin Spectroscopy 、 Majorite 、 Bulk modulus 、 Diamond anvil cell 、 Mantle (geology) 、 Materials science 、 Shear stress
摘要: The bulk modulus of a natural sample cubic majorite, one the primary components Earth's transition zone, has been determined by two independent methods: quasi-hydrostatic compression in diamond anvil cell and Brillouin spectroscopy at room pressure. measurements agree well, together yield zero-pressure isothermal KOT = 162.7 (±3.3) GPa, pressure derivative 6.6 (±0.8). Additional experiments under nonhydrostatic conditions show that majorite supports shear stresses least 2 to 3 GPa pressures 7–11 among highest values yet documented silicates or oxides comparable pressures. These results imply high strength for suggesting zone could be strong degree may influence deformation heat transfer within Earth.
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