Periclase
MgO
fourth-order Birch-Murnaghan · Original · 2000
V₀
—
Unknown basis
K₀
162.500
GPa
Adiabatic
K′
3.990
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 energy-dispersive x-ray diffraction in diamond anvil cell (0–55 GPa)
- 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
Table 2: This study* (0–55 GPa): K0S = 162.5(7) GPa, K'0S = 3.99(3), G0S = 130.4(1.7), G'0S = 2.85(9), G''0S = -0.084(6). 'The adiabatic bulk modulus KS can be fitted well to a third-order finite strain equation of state ... but the shear modulus GS requires a fourth-order finite strain equation of state.'
Additional notes
G0S GPa
130.4(1.7)
Gp0S
2.85(9)
Gpp0S per GPa
-0.084(6)
rho0 g per cm3
3.585
pressure range GPa
0–55
note
No V0 unit-cell volume tabulated; ambient density rho0 = 3.585 g/cm3 given in Fig. 3 caption