Stishovite

SiO2

third-order Birch-Murnaghan · Original · 2012

V₀

46.55

Å³

Unit cell

K₀

294

GPa

Isothermal

K′

4.850

dimensionless

Volume (V₀)

Value	Unit	Basis	Z
46.55	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
SiO2	1

Formula: SiO2

Conditions & method

T_ref: 300 K
P_ref: —
Structure: rutile-type (stishovite)
Method: experiment (XRD / DAC / multianvil compression)
in situ P-V-T synchrotron XRD in sintered-diamond Kawai-type multianvil apparatus (SPEED-MK.II, BL04B1 SPring-8), 17-54 GPa, 300-1700 K, Au pressure scale (Tsuchiya 2003)
Sample: synthesized from high-purity alpha-quartz powder mixed with 5 wt % Au pressure marker

Source

Paper: P‐V‐T equation of state of stishovite up to mid‐lower mantle conditions
Authors: Fulong Wang; Yoshinori Tange; Tetsuo Irifune; Ken‐ichi Funakoshi
DOI: 10.1029/2011jb009100
Year: 2012
Journal: Journal of Geophysical Research Atmospheres
Origin: Original (measured or fitted in the source paper)

Evidence from the paper

Table 2. EOS Parameters of Stishovite: Third-Order Birch-Murnaghan: V0 (Å3) 46.55a, K_T0 (GPa) 294(2), K'_T0 4.85(12), Θ0(K) 1130(100), γ0 1.66(7), a 1a, b 2.9(4); aFixed in EOS analyses. 'five model parameters, K_T0, K'_T0, Θ0, γ0, and b, were determined with fixed V0 of 46.55 Å3 determined at ambient conditions in this study'.

Additional notes

Theta 0 K

1130(100)

gamma 0

1.66(7)

a parameter

1 (fixed)

b parameter

2.9(4)

V0 fixed in fit

V0 fixed at 46.55 Å3 in EOS analyses, determined at ambient conditions in this study (recovered sample: 46.553(19) Å3)

K S0 derived

K_S0 = 296 GPa (third-order Birch-Murnaghan) with uncertainty ±2 GPa