Stishovite
SiO2
third-order Birch-Murnaghan · Original · 2003
Why this differs from similar rows?
Axial (linearized a3) modulus from a separate fit to model the a lattice parameter alone, not the full unit-cell EoS reported in the sibling row.
V₀
—
Unknown basis
K₀
250.900
GPa
Unknown
K′
5.480
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
- experiment (XRD / DAC / multianvil compression)single-crystal and powder X-ray diffraction in diamond anvil cell
- Sample
- a^3 axial EoS, third-order fit used to model lattice parameter evolution
Source
- Paper
- Equation of state of stishovite to lower mantle pressures
- Authors
- D. Andrault; R. J. Angel; J. L. Mosenfelder; Tristan Le Bihan
- DOI
- 10.2138/am-2003-2-307
- Year
- 2003
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
To model the pressure evolution of the stishovite lattice parameters, we thus use a third-order Birch-Murnagham EoS for a3 [K0 = 250.9(1.6) GPa and K'0 = 5.48(0.32)] and a linear equation for c (c = 2.6654 – 0.001581 P).
Additional notes
note
axial (linearized a^3) modulus, not full unit-cell EoS