Stishovite
SiO2
third-order Birch-Murnaghan · Original · 2020
V₀
46.5
ų
Unit cell
K₀
307
GPa
Isothermal
K′
4.660
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 46.5 | ų | Unit cell | — |
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
- 300 K
- Pref
- —
- Structure
- rutile-type (stishovite)
- Method
- experiment (shock wave)laser-driven shock compression with in-situ XFEL XRD; shock data corrected to 300 K isotherm and fitted with EosFit
- Sample
- polycrystalline stishovite synthesized in large volume press (run SACLA-795997 ambient)
Source
- Paper
- Evidence of shock-compressed stishovite above 300 GPa
- Authors
- M. Schoelmerich; T. Tschentscher; Shrikant Bhat; C. A. Bolme; Eric Cunningham; Robert Farla; Eric Galtier; A. E. Gleason; M. Harmand; Yuichi Inubushi; Kento Katagiri; Kohei Miyanishi; Bob Nagler; Norimasa Ozaki; Thomas R. Preston; R. Redmer; Ray F. Smith; Tsubasa Tobase; Tadashi Togashi; S. J. Tracy; Y. Umeda; L. Wollenweber; T. Yabuuchi; U. Zastrau; Karen Appel
- DOI
- 10.1038/s41598-020-66340-y
- Year
- 2020
- Journal
- Scientific Reports
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The shock wave data fit yields a bulk modulus of K0 = 307 ± 4 GPa and its first pressure derivative K0' = 4.66 ± 0.15 GPa in the range of 0–336 GPa ... corrected the shock wave data to a 300 K isotherm. Table 1: SACLA-795997 ambient V (Å3) 46.5 (2).
Additional notes
pressure range
0–336 GPa
initial density rho0
4.30 g/cm3
note Kp unit
Paper reports K0' with unit 'GPa' verbatim, though K' is normally dimensionless
fitting software
EosFit
thermal correction
300 K isotherm via Grüneisen parameter gamma(V)=gamma0(V/V0)^q with literature q (ref 24) and gamma0 (ref 33)