Periclase
MgO
Vinet · Original · 2023
V₀
0.2767
cm³/g
Unknown basis
K₀
169.800
GPa
Unknown
K′
4.501
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 0.2767 | cm³/g | 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 | 1 |
Formula: MgO
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (shock wave)global optimization of thermodynamic model parameters against shock compression P-V-T data, Hugoniot sound velocities, and room-temperature sound velocities
- Sample
- single crystal (100) MgO, initial density 3.590(0.004) g/cm3
Source
- Paper
- Equation of state of MgO up to 345 GPa and 8500 K
- Authors
- Yin Luo; Shikai Xiang; Jun Li; Jian Wu; Lixin Liu; Jiabo Li; Yunting Xian; Run Wu
- DOI
- 10.1103/physrevb.107.134116
- Year
- 2023
- Journal
- Physical review. B./Physical review. B
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
According to the above method, the parameters of the thermodynamic model at zero temperature with their uncertainties are V0K = 0.2767 ± 0.0001 cm3/g, B0 = 169.8 ± 0.5 GPa, B' = 4.501 ± 0.007. ... The cold energy E0K(V) can be described by the two-order Rydberg-Vinet equation, where V0K is the initial volume per unit mass of sample, B0 is the bulk modulus, and B' is the pressure derivative of the bulk modulus at zero pressure and zero temperature.
Additional notes
V0 basis note
specific volume per unit mass (cm3/g), not unit-cell or molar volume
reference state note
parameters defined at zero temperature and zero pressure (cold curve / static lattice reference of the thermodynamic model)
EOS validity range
up to 345 GPa and 8500 K
constraining data
measured Hugoniot sound velocities and temperatures up to 265 GPa (this study), shock P-V-T data at 170-204 GPa (Svendsen and Ahrens), preheated (1850 K) shock data at 102-248 GPa (Fat'yanov et al.), room-temperature sound velocities (Kono et al.; Li et al.)
thermal model
quasi-Debye model with phonon dispersion from volume-dependent sound velocities; electronic contribution neglected (insulator)
fitted D up relation
D = 6.63(0.07) + 1.348(0.015)up for P > 70 GPa, correlation coefficient -0.98