Akimotoite
(Mg0.32,Fe0.68)SiO3 (enstatite mole fraction 0.32)
Murnaghan · Original · 2007
V₀
—
Unknown basis
K₀
301
GPa
Adiabatic
K′
—
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| — | — | Unknown basis | — |
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 | 0.32 |
| FeO | 0.68 |
| SiO2 | 1 |
Formula: (Mg0.32Fe0.68)SiO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- ilmenite (akimotoite)
- Method
- experiment (shock wave)shock-wave Hugoniot data reduced to isentrope; composition corrected via 'molar additivity of Phi' rule
- Sample
- Eclogite H (Healdsburg, California), derivative composition (Table 3)
Source
- Paper
- On the Occurrence of (Mg, Fe)SiO3 in the Lower Mantle
- Authors
- E. K. Graham
- DOI
- 10.1111/j.1365-246x.1975.tb06463.x
- Year
- 2007
- Journal
- Geophysical Journal of the Royal Astronomical Society
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 3. Calculated elastic properties for the 'ilmenite-like' phases: ... Eclogite H ... Derivative composition: Enstatite Mole Fraction 0.32, rho (g cm-3) 4.42, K0^S (Mbar) 3.01, Phi (km s-1)^2 68.0
Additional notes
rho0
4.42 g cm-3
Phi
68.0 (km s-1)^2
Kp context
values of (dK^S/dP)_0 on the order of 2 were required to fit the high-pressure shock-wave data for all rocks