Post-perovskite
MgSiO3
AP2 · Original · 2016
Why this differs from similar rows?
'fit4': This study + Guignot et al. data with V0 fixed to 163.45 A3 from the g-G plot; sibling row 'fit3' instead lets V0 float freely.
V₀
163.45
ų/cell
Formula unit
K₀
228
GPa
Isothermal
K′
4.180
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 163.45 | ų/cell | Formula unit | — |
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
- 300 K
- Pref
- —
- Structure
- post-perovskite (CaIrO3-type, Cmcm)
- Method
- experiment (XRD / DAC / multianvil compression)LHDAC powder X-ray diffraction
- Sample
- fit4 (This study + Guignot et al. data, V0 fixed by g-G plot)
Source
- Paper
- Experimental and theoretical thermal equations of state of MgSiO3 post-perovski…
- Authors
- Takeshi Sakai; Haruhiko Dekura; Naohisa Hirao
- DOI
- 10.1038/srep22652
- Year
- 2016
- Journal
- Scientific Reports
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1: 163.45*g fix | 228± 1 | 4.18± 0.04 | γ0=1.50± 0.10 | γ∞=2/3 fix | q=1.80± 0.08 | θ0=849± 260 | fit4 | Exp., LHDAC | T-MgO(AP2). Text: 'the g-G plot yielded a V0 of ... 163.45 ± 0.42 Å3 for the AP2'
Additional notes
fit number
fit4
V0 note
V0 fixed to value determined by g-G plot (163.45 ± 0.42 Å3 in text)
gamma0
1.50± 0.10
gamma inf
2/3 fix
q or beta
1.80± 0.08
theta0 K
849± 260
pressure scale
T-MgO(AP2): Tange et al. MgO scale