Stishovite
SiO2
third-order Birch-Murnaghan · Original · 1999
V₀
—
Unknown basis
K₀
310
GPa
Unknown
K′
4.240
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
- rutile-type (stishovite)
- Method
- first-principles DFT / ab initiofirst principles plane wave pseudopotential (LDA), static calculation
- Sample
- Table 1, Calc row
Source
- Paper
- Seismic velocities of major silicate and oxide phases of the lower mantle
- Authors
- Bijaya B. Karki; Lars Stixrude
- DOI
- 10.1029/1999jb900069
- Year
- 1999
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1: Stishovite, Calc M: K = 310, G = 223; M': K' = 4.24, G' = 1.72. SiO2 discussed as deep-mantle candidate with stishovite-to-CaCl2 transition at 47 GPa. 'Third-order Eulerian finite strain equations are fit to the calculated results'.
Additional notes
G0 GPa
223
Gp
1.72
note
c33 and c13 of stishovite used fourth-order fits (M''=0.028 and 0.011 GPa^-1)