Stishovite
SiO2
third-order Birch-Murnaghan · Original · 2024
V₀
—
Unknown basis
K₀
308.200
GPa
Isothermal
K′
4.900
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 |
|---|---|
| SiO2 | 1 |
Formula: SiO2
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- other / unspecified
- Method
- experiment (Brillouin / ultrasonic / elasticity)ultrasonic interferometry with in situ synchrotron X-ray diffraction
- Sample
- polycrystalline stishovite (this study), adiabatic moduli converted to isothermal
Source
- Paper
- Sound Velocities of Stishovite at Simultaneous High Pressure and High Temperatu…
- Authors
- Sibo Chen; Siheng Wang; Xintong Qi; Man Xu; Tony Yu; Yanbin Wang; Baosheng Li
- DOI
- 10.1029/2023gl107700
- Year
- 2024
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
To compare with previous equation of state studies, we converted the adiabatic bulk moduli and its pressure and temperature derivatives to isothermal values using equations in Speziale and Duffy (2002). The calculated K_T0 (308.2 GPa) and K_T' (4.90) are within the range (K_T0: 292-309.9 GPa, K_T0': 4.3-6) reported in previous studies. Table 1: K_T0 = 308.2(46)^a, K_T' = 4.90(10)^b.
Additional notes
dKT dT
-0.031 GPa/K (calculated from dKS/dT)
conversion notes
K_T0 = K_S/(1 + alpha*gamma*T); K_T' = [K_S' - gamma*T/K_T (dKT/dT)]/(1 + alpha*gamma*T)