Periclase
MgO
third-order Birch-Murnaghan · Original · 2000
V₀
—
Unknown basis
K₀
160.200
GPa
Isothermal
K′
4.030
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| — | — | 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
- 300 K
- Pref
- —
- Structure
- B1 rocksalt (Fm-3m)
- Method
- experiment (Brillouin / ultrasonic / elasticity)Brillouin scattering + synchrotron x-ray diffraction in diamond anvil cell; primary pressure scale via integration of K_T = rho(dP/drho)_T
- Sample
- single-crystal MgO (Brillouin) + polycrystalline MgO (x-ray diffraction), helium pressure medium
Source
- Paper
- Elasticity of MgO and a primary pressure scale to 55 GPa
- Authors
- Chang‐Sheng Zha; Ho‐kwang Mao; Russell J. Hemley
- DOI
- 10.1073/pnas.240466697
- Year
- 2000
- Journal
- Proceedings of the National Academy of Sciences
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
'With the aforementioned adiabatic to isothermal correction factor (1 + αγT), the resultant isothermal bulk modulus is K0T = 160.2(7) GPa and its pressure derivative K'0T = 4.03(3). This isothermal equation of state was used for calculating the primary pressure scale.' Fig. 3: 'Isothermal (300 K) pressure–density equations of state of MgO, ρ0 = 3.585 g/cm3.'
Additional notes
rho0 g per cm3
3.585
alpha0 per K
3.12e-5
gamma0
1.54
dKT dT GPa per K
-0.03
note
Isothermal values derived from adiabatic BM3 fit; used as primary pressure scale to 55 GPa