Stishovite
SiO2
second-order Birch-Murnaghan · Original · 2003
Why this differs from similar rows?
Axial modulus for the c3 lattice parameter (second-order BM, K' fixed to 4); sibling row is the corresponding a3 axial modulus (258 GPa), a different crystallographic axis.
V₀
—
Unknown basis
K₀
496
GPa
Unknown
K′
4
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
- c^3 axial EoS from combined data
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
A refinement of a second-order Birch-Murnagham EoS (with K' = 4) yields K0 = 258(2) GPa or K0 = 496(8) GPa for the pressure evolution of a3 or c3, respectively.
Additional notes
note
axial (linearized c^3) modulus, not full unit-cell EoS; c parameter also modeled as linear function c = 2.6654 – 0.001581 P