Akimotoite
MgSiO3
Birch-Murnaghan (order unspecified) · Original · 2015
V₀
26.35
cm³/mol
Molar
K₀
215.300
GPa
Isothermal
K′
4.910
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 26.35 | cm³/mol | Molar | — |
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
- 298.2 K
- Pref
- 0.000 GPa
- Structure
- ilmenite (akimotoite)
- Method
- unknownfit to heat capacity, P–V–T volume, and adiabatic bulk modulus data (Ashida et al., 1988; Reynard et al., 1996; Wang et al., 2004; Zhou et al., 2014)
- Sample
- Table 1, Akimotoite column
Source
- Paper
- The equations of state of forsterite, wadsleyite, ringwoodite, akimotoite, MgSi…
- Authors
- Peter I. Dorogokupets; А. M. Dymshits; T. S. Sokolova; B. S. Danilov; Konstantin D. Litasov
- DOI
- 10.1016/j.rgg.2015.01.011
- Year
- 2015
- Journal
- Russian Geology and Geophysics
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1. Akimotoite: V0, cm3/mol = 26.35; K0, GPa = 215.3; K′ = 4.91; k = 5. 'An equation of state for Akm was set up with regard to measurements of heat capacity (Akaogi et al., 2008; Ashida et al., 1988), volume depending on T and P..., and adiabatic bulk modulus depending on T and P (Zhou et al., 2014).' Discussed relative to the 660-km discontinuity: 'The Akm–Prv transition (709–733 km), which is in immediate proximity to the 660-km discontinuity...'
Additional notes
U0 kJ per mol
-1524.0
theta01 K
995
m1
7.5
theta02 K
451
m2
7.5
gamma0
2
beta
1.41
gamma inf
0.26
k
5
lower mantle relevance
Akm–Prv transition at 709–733 km superposed near 660-km discontinuity