Akimotoite
(Mg0.72,Fe0.28)SiO3 (enstatite mole fraction 0.72)
Murnaghan · Original · 2007
Why this differs from similar rows?
Derivative composition based on shock data for Diabase C (Centreville, Virginia); sibling row uses a different starting rock sample, Diabase F (Frederick, Maryland).
V₀
—
Unknown basis
K₀
296
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 | 0.72 |
| FeO | 0.28 |
| SiO2 | 1 |
Formula: (Mg0.72Fe0.28)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
- Diabase C (Centreville, Virginia), 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. ... Diabase C ... Derivative composition: Enstatite Mole Fraction 0.72, rho (g cm-3) 4.02, K0^S (Mbar) 2.96, Phi (km s-1)^2 73.7
Additional notes
rho0
4.02 g cm-3
Phi
73.7 (km s-1)^2