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, Si1.98] ∑9.27O12. 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) Å3, density ρo = 4.145 g/cm3, and bulk modulus Ko = 198(±3) GPa when the first pressure is derivative of the bulk modulus K′0 is fixed to 4. The density of hexagonal aluminous phase is lower than that of coexisting Mg-perovskite in the subducted oceanic crust.
| Original language | English |
|---|---|
| Pages (from-to) | 527-531 |
| Number of pages | 5 |
| Journal | Physics and Chemistry of Minerals |
| Volume | 29 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Sep 1 2002 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Geochemistry and Petrology
Cite this
Equation of state of hexagonal aluminous phase in basaltic composition to 63 GPa at 300 K. / Ono, S.; Hirose, K.; Nishibori, Maiko; Mibe, K.; Saito, Y.
In: Physics and Chemistry of Minerals, Vol. 29, No. 8, 01.09.2002, p. 527-531.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Equation of state of hexagonal aluminous phase in basaltic composition to 63 GPa at 300 K
AU - Ono, S.
AU - Hirose, K.
AU - Nishibori, Maiko
AU - Mibe, K.
AU - Saito, Y.
PY - 2002/9/1
Y1 - 2002/9/1
N2 - 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, Si1.98] ∑9.27O12. 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) Å3, density ρo = 4.145 g/cm3, and bulk modulus Ko = 198(±3) GPa when the first pressure is derivative of the bulk modulus K′0 is fixed to 4. The density of hexagonal aluminous phase is lower than that of coexisting Mg-perovskite in the subducted oceanic crust.
AB - 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, Si1.98] ∑9.27O12. 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) Å3, density ρo = 4.145 g/cm3, and bulk modulus Ko = 198(±3) GPa when the first pressure is derivative of the bulk modulus K′0 is fixed to 4. The density of hexagonal aluminous phase is lower than that of coexisting Mg-perovskite in the subducted oceanic crust.
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U2 - 10.1007/s00269-002-0263-5
DO - 10.1007/s00269-002-0263-5
M3 - Article
AN - SCOPUS:0036748064
VL - 29
SP - 527
EP - 531
JO - Physics and Chemistry of Minerals
JF - Physics and Chemistry of Minerals
SN - 0342-1791
IS - 8
ER -