Akimotoite
MgSiO3
third-order Birch-Murnaghan · Original · 1996
V₀
262.17
ų
Unit cell
K₀
212
GPa
Unknown
K′
5.600
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 262.17 | ų | Unit cell | — |
Reported value and unit are preserved as extracted. Z (formula units per cell) is not stored yet, so molar ↔ ų/f.u. conversion is not applied automatically.
Composition
| Oxide | Molar |
|---|---|
| MgO | 1 |
| SiO2 | 1 |
Formula: MgSiO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- ilmenite (akimotoite)
- Method
- experiment (XRD / DAC / multianvil compression)energy-dispersive synchrotron X-ray powder diffraction in diamond-anvil cell (ice-VII EOS pressure scale, H2O medium)
- Sample
- polycrystalline MgSiO3 ilmenite synthesized at 22.5 GPa, 1200 °C from MgSiO3 glass
Source
- Paper
- High-pressure X-ray diffraction study and equation of state of MgSiO 3 ilmenite
- Authors
- Bruno Reynard; G. Fiquet; J. P. Itié; D. C. Rubie
- DOI
- 10.2138/am-1996-1-206
- Year
- 1996
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
the data yield K~ = 7.5(10) if the ruby-fluorescence pressures are used or K~ = 5.6(10) if the pressures obtained from the equation of state of ice VII are used; the latter value is preferred because pressures were determined on the X-ray spot. ... Thus, we fixed the Ko value at 212 GPa ... The ambient pressure volume was left to vary and never departed from our measurement in the cell by more than 0.01%. Table 1: P = 0.00 GPa, V = 262.17(49) ų.
Additional notes
K0 source
fixed at Brillouin-scattering value of Weidner and Ito (1985)
pressure scale
ice VII EOS (Hemley et al. 1987)
preferred
yes, authors prefer the ice-scale K′ = 5.6(10)