Stishovite
SiO2 with 6.07(5) wt% Al2O3 and 0.24(2) wt% H2O
none (not an EOS fit) · Original · 2007
Why this differs from similar rows?
Sample K324 (6.07 wt% Al2O3, 0.24 wt% H2O, synthesized 20 GPa/1800C/1h); different synthesis/composition batch from sibling sample K325.
V₀
—
Unknown basis
K₀
290
GPa
Adiabatic
K′
—
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 (Brillouin / ultrasonic / elasticity)Brillouin scattering with Voigt-Reuss-Hill averaging; density from X-ray diffraction
- Sample
- K324
Source
- Paper
- Effect of Al3+ and H+ on the elastic properties of stishovite
- Authors
- D. L. Lakshtanov; Konstantin D. Litasov; Stanislav Sinogeikin; H. Hellwig; Jie Li; Eiji Ohtani; Jay D. Bass
- DOI
- 10.2138/am.2007.2294
- Year
- 2007
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
For the sample of stishovite containing 6.07(5) wt% Al2O3 and 0.24(2) wt% H2O we obtained: zero-pressure adiabatic bulk modulus, K_S0 = 290(3) GPa, and the shear modulus, G_S0 = 207(2) GPa, with a calculated density of rho = 4.16(1) g/cm3 based on X-ray diffraction. Table 4: Ks (GPa) 290(3); KT (GPa) 286(3) for K324.
Additional notes
KT0 GPa
286(3)
KT0 note
isothermal bulk modulus converted via K_T0 = K_S0(1 + alpha*gamma*T)^-1 with alpha = 1.62(9)e-5 and gamma = 1.33(6) (Nishihara et al. 2005)
G S0 GPa
207(2)
density g cm3
4.159(1)
vp km s
11.662(15)
vs km s
7.049(15)
synthesis conditions
20 GPa, 1800 C, 1 h (Table 1)