Periclase

MgO

other named EOS · Original · 2000

V₀

11.25

m³/mol

Molar

K₀

161.500

GPa

Isothermal

K′

4.769

dimensionless

Volume (V₀)

Value	Unit	Basis	Z
11.25	m³/mol	Molar	—

Reported value and unit are preserved as extracted. Z (formula units per cell) is not stored yet, so molar ↔ Å³/f.u. conversion is not applied automatically.

Composition

Oxide	Molar
MgO	1

Formula: MgO

Conditions & method

T_ref: 298.2 K
P_ref: 0.000 GPa
Structure: B1 rocksalt (Fm-3m)
Method: experiment (Brillouin / ultrasonic / elasticity)
optimisation of ambient-pressure thermodynamic data (Ks from resonance data of Isaak et al., thermal expansivity, Cp); linear fit of V vs ln(K)
Sample: MgO, ambient conditions

Source

Paper: A new equation of state based on Grover, Getting and Kennedy's empirical relati…
Authors: Michel H.G. Jacobs; Harry A.J. Oonk
DOI: 10.1039/a910247g
Year: 2000
Journal: Physical Chemistry Chemical Physics
Origin: Original (measured or fitted in the source paper)

Evidence from the paper

"for MgO it implies the following values of K0(T0 = 298.15 K) and b in eqn. (1): K0(T0) = (161.5 ± 0.6) GPa, b = (−2.359 ± 0.003) × 10−6 m3 mol−1 ... The value of K' is 4.769 ± 0.005 for MgO at ambient conditions, for which Vm0(T0 = 298.15 K) = 11.25 × 10−6 m3 mol−1 (Robie et al.), and follows from eqns. (24) and (19) for constant b."

Additional notes

b parameter

(-2.359 ± 0.003) × 10−6 m3 mol−1

Kpp

K'' = -0.0295 ± 0.0001 GPa−1 at ambient conditions

V0 source

Robie et al. (ref. 28); Table 1 lists V_m^0 = 11.2507 cm3 and K0 = 161.50 GPa at 300 K

note

K' derived from K' = -V_m/b, not fitted directly to compression data; validated against static and shock compression data up to 225 GPa