Periclase

MgO

third-order Birch-Murnaghan · Original · 2008

Why this differs from similar rows?

Three-parameter fit to all He-medium data from all three runs (Mao et al. 1986 ruby scale plus diamond-Raman for six highest points); differs from the KCl-medium fits.

V₀

74.687

Å³

Unit cell

K₀

159.600

GPa

Isothermal

K′

3.740

dimensionless

Volume (V₀)

Value	Unit	Basis	Z
74.687	Å³	Unit cell	—

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: —
P_ref: —
Structure: B1 rocksalt (Fm-3m)
Method: experiment (XRD / DAC / multianvil compression)
single-crystal angle-dispersive monochromatic synchrotron X-ray diffraction in helium-loaded diamond-anvil cell to 118 GPa
Sample: single-crystal MgO, helium pressure medium, all three runs (Table 1), pressures from Mao et al. (1986) quasi-hydrostatic ruby gauge plus diamond-Raman shift for six highest points

Source

Paper: Compression of single-crystal magnesium oxide to 118 GPa and a ruby pressure ga…
Authors: Steven D. Jacobsen; C. M. Holl; K. A. Adams; R. A. Fischer; Emily S. Martin; Craig R. Bina; Jung‐Fu Lin; Vitali B. Prakapenka; Atsushi Kubo; Przemysław Dera
DOI: 10.2138/am.2008.2988
Year: 2008
Journal: American Mineralogist
Origin: Original (measured or fitted in the source paper)

Evidence from the paper

A three-parameter fit to the helium-medium data from all three runs (Table 1) yields V0 = 74.687(6) Å3, KT0 = 159.6(6), and K' = 3.74(3), plotted as the dashed curve in Figure 2.

Additional notes

abstract values

Abstract quotes V0 = 74.697(6) Å3, KT0 = 159.6(6) GPa, K′ = 3.74(3) for compression in helium (slight V0 discrepancy with body text)

pressure scale

quasi-hydrostatic ruby gauge of Mao et al. (1986); six highest pressures of run 3 from diamond-Raman shift (Sun et al. 2005) with ±2 GPa assumed uncertainty

max pressure

118 GPa