Periclase
MgO
third-order Birch-Murnaghan · Original · 2006
Why this differs from similar rows?
First fit described in text, using decompression data after annealing per the sample description; sibling row instead fits the entire compression+decompression data set.
V₀
74.702
ų
Unit cell
K₀
163.500
GPa
Adiabatic
K′
4.200
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 74.702 | 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 |
Formula: MgO
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (Brillouin / ultrasonic / elasticity)ultrasonic interferometry + in situ X-ray diffraction + X-ray imaging (DIA-type cubic anvil)
- Sample
- polycrystalline MgO hot-pressed at ~8 GPa and 1400C; decompression data after annealing
Source
- Paper
- Elasticity of MgO to 11 GPa with an independent absolute pressure scale: Implic…
- Authors
- Baosheng Li; Kelly Woody; Jennifer Kung
- DOI
- 10.1029/2005jb004251
- Year
- 2006
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
we first fit these data to equations (1) and (2), yielding K0S = 163.5(11) GPa. K'0S = 4.20(10), G0 = 129.8(6) GPa, and G'0 = 2.42(6). ... V0 = 74.702(26)A^3.
Additional notes
G0
129.8(6) GPa
Gp
2.42(6)
K0pp implied
[-0.025] GPa^-1 (implied by 3rd-order finite strain fit)
note
sample pressures determined absolutely via Birch-Murnaghan EOS (equation 3) without secondary pressure standard