TY - JOUR

T1 - The high-pressure and temperature equation of state of a majorite solid solution in the system of Mg4Si4O12-Mg3Al2Si3O12

AU - Morishima, H.

AU - Otani, Eiji

AU - Kato, T.

AU - Kubo, T.

AU - Suzuki, Akio

AU - Kikegawa, T.

AU - Shimomura, O.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - The high-pressure and temperature equation of state of majorite solid solution, Mj0.8Py0.2, was determined up to 23 GPa and 773 K with energy-dispersive synchrotron X-ray diffraction at high pressure and high temperature using the single- and double-stage configurations of the multianvil apparatuses, MAX80 and 90. The X-ray diffraction data of the majorite sample were analyzed using the WPPD (whole-powder-pattern decomposition) method to obtain the lattice parameters. A least-squares fitting using the third-order Birch-Murnaghan equation of state yields the isothermal bulk modulus, K(TO) = 156 GPa, its pressure derivative, K' = 4.4(±0.3), and temperature derivative (partial differential K(T)/ partial differential T)(P) = -1.9(±0.3) x 10-2 GPa/K, assuming that the thermal expansion coefficient is similar to that of pyrope-almandine solid solution.

AB - The high-pressure and temperature equation of state of majorite solid solution, Mj0.8Py0.2, was determined up to 23 GPa and 773 K with energy-dispersive synchrotron X-ray diffraction at high pressure and high temperature using the single- and double-stage configurations of the multianvil apparatuses, MAX80 and 90. The X-ray diffraction data of the majorite sample were analyzed using the WPPD (whole-powder-pattern decomposition) method to obtain the lattice parameters. A least-squares fitting using the third-order Birch-Murnaghan equation of state yields the isothermal bulk modulus, K(TO) = 156 GPa, its pressure derivative, K' = 4.4(±0.3), and temperature derivative (partial differential K(T)/ partial differential T)(P) = -1.9(±0.3) x 10-2 GPa/K, assuming that the thermal expansion coefficient is similar to that of pyrope-almandine solid solution.

KW - Majorite garnet

KW - PVT observation

KW - X-ray diffraction

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U2 - 10.1007/s002690050234

DO - 10.1007/s002690050234

M3 - Article

AN - SCOPUS:0033493907

VL - 27

SP - 3

EP - 10

JO - Physics and Chemistry of Minerals

JF - Physics and Chemistry of Minerals

SN - 0342-1791

IS - 1

ER -