EQUATION OF STATE OF HEXAGONAL ALUMINOUS PHASE IN BASALTIC COMPOSITION TO 63 GPA AT 300 K
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dc.contributor.author | Ono S. | |
dc.contributor.author | Hirose K. | |
dc.contributor.author | Isshiki M. | |
dc.contributor.author | Mibe K. | |
dc.contributor.author | Saito Y. | |
dc.date.accessioned | 2021-06-03T06:25:20Z | |
dc.date.available | 2021-06-03T06:25:20Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=1369783 | |
dc.identifier.citation | Physics and Chemistry of Minerals, 2002, 29, 8, 527-531 | |
dc.identifier.issn | 0342-1791 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/28805 | |
dc.description.abstract | A laser-heated diamond-anvil cell that is capable of operating up to a pressure of 63 GPa, with X-ray diffraction facilities using a synchrotron radiation source at the SPring-8, has been developed to observe the compressibility of a hexagonal aluminous phase, [K0.15Na1.66Ca0.11Mg1.29Fe2+0.86Al3.13Ti0.09Si1.98] Σ9.27O12. The hexagonal aluminous phase is a potassium host mineral from the subducted oceanic crust in the Earth's lower mantle. A sample was heated using a YAG laser at each pressure increment to relax the deviatoric stress in the sample. X-ray diffraction measurements were carried out at 300 K using an angle-dispersive technique. Pressure was measured using an internal platinum pressure calibrant. The observed unit-cell volumes were used to obtain a third-order Birch-Murnaghan equation of state: unit-cell volume Vo=185.94(±16) A3, density ρo=4.145 g/cm3, and bulk modulus Ko=198(±3) GPa when the first pressure is derivative of the bulk modulus K'o is fixed to 4. The density of hexagonal aluminous phase is lower than that of coexisting Mg-perovskite in the subducted oceanic crust. | |
dc.subject | HEXAGONAL ALUMINOUS PHASE | |
dc.subject | EQUATION OF STATE | |
dc.subject | X-RAY POWDER DIFFRACTION | |
dc.title | EQUATION OF STATE OF HEXAGONAL ALUMINOUS PHASE IN BASALTIC COMPOSITION TO 63 GPA AT 300 K | |
dc.type | Статья |
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