Periclase
MgO
third-order Birch-Murnaghan · Original · 2026
V₀
74.7
ų
Unit cell
K₀
160.600
GPa
Isothermal
K′
4.220
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 74.7 | 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 (XRD / DAC / multianvil compression)internally consistent EoS fit to previously reported static DAC XRD experiments with high-temperature annealing
- Sample
- Table I, internally consistent EoS for MgO
Source
- Paper
- Dynamic compression and pressure cycling in dynamic diamond anvil cells: MgO an…
- Authors
- Biao Wang; Niccolò Satta; Egor Koemets; Johannes Buchen; Viktoria Trautner; Alba San José Méndez; Giacomo Criniti; Konstantin Glazyrin; Hanns-Peter Liermann; Hauke Marquardt
- DOI
- 10.1103/5zj5-5h4y
- Year
- 2026
- Journal
- Physical review. B./Physical review. B
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
TABLE I. Internally consistent third-order Birch–Murnaghan EoS parameters for MgO, Pt, Au, and Ne at 300 K. ... V0 (Å3) K (GPa) K0' ... 74.70 4.22(1) 160.6(2) [MgO row]. 'To minimize discrepancies arising from variations in the EoS, we derived internally consistent EoS for MgO, Ne, Pt, and Au (Table I) from previously reported static DAC experiments in which high-temperature annealing was used to reduce nonhydrostatic stresses.'
Additional notes
notes
MgO is described as 'the Mg-rich end member of (Mg1-xFex)O ferropericlase, the second most abundant mineral in the Earth's lower mantle'. Table layout in the source text is scrambled; MgO row values assigned as V0 = 74.70 Å3, K0 = 160.6(2) GPa, K' = 4.22(1) consistent with known MgO EoS values. EoS parameters were derived in this study by refitting previously reported static DAC data (see Supplemental Material for procedure, following the approach of Ref. [35]). Pressures in the dDAC runs were derived from MgO volumes (200 reflection) using this EoS.