Periclase
MgO
fourth-order Birch-Murnaghan · Original · 1995
V₀
—
Unknown basis
K₀
162.500
GPa
Adiabatic
K′
4.090
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 (shock wave)shock compression (Hugoniot) combined with ultrasonic elasticity data extrapolated from 3 GPa
- Sample
- low-porosity polycrystalline MgO (Hugoniot data combined with single-crystal ultrasonic data)
Source
- Paper
- Compressional sound velocity, equation of state, and constitutive response of s…
- Authors
- T. S. Duffy; Thomas J. Ahrens
- DOI
- 10.1029/94jb02065
- Year
- 1995
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
By combining the Hugoniot results with ultrasonic data, the adiabatic bulk modulus and its first and second pressure derivatives at constant entropy are 162.5(2) GPa, 4.09(9), and -0.019(4) GPa-1. ... Solid curve is a fourth-order Birch-Murnaghan fit to shock data with K0S and K'0S constrained at ultrasonic values. Table 5: K0S, GPa 162.5(2) [Jackson and Niesler, 1982]; (dK0S/dP)S 4.09(9) [Jackson and Niesler, 1982]; (d2K0S/dP2)S, GPa-1 -0.019(4) [this study].
Additional notes
K0S and Kp source
Jackson and Niesler [1982] ultrasonic measurements to 3 GPa; constrained (held fixed) in the fourth-order Birch-Murnaghan fit to reduced shock data
K0S second pressure derivative
-0.019(4) GPa-1 (this study, fitted)
K0S second derivative third order truncation
-0.025(1) GPa-1
isothermal second derivative from shock
(d2K0T/dP2)T = -0.022(4) GPa-1 (single-crystal shock data)
G0
130.8(2) GPa
G0 prime
2.5(1)
G0 double prime
-0.026(45) GPa-1
rho0
3.584(1) g/cm3 (X-ray density, Table 5)
gamma0
1.52(2) [Sumino et al., 1983]
q
1.0(5) (assumed)
Hugoniot fit polycrystal
US = 6.87(10) + 1.24(4)up (14-133 GPa)
Hugoniot fit single crystal
US = 6.61(5) + 1.36(2)up
note on V0
No zero-pressure volume reported; only ambient densities given (bulk density 3.562(6) g/cm3, crystal density 3.571(4) g/cm3, X-ray density 3.584 g/cm3)