Davemaoite
CaSiO3
third-order Birch-Murnaghan · Original · 1996
V₀
45.58
ų
Unit cell
K₀
232
GPa
Isothermal
K′
4.800
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 45.58 | 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 |
|---|---|
| CaO | 1 |
| SiO2 | 1 |
Formula: CaSiO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- cubic perovskite (Pm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)in situ synchrotron X-ray diffraction, DIA-6 cubic-anvil apparatus (SAM-85), NaCl pressure medium
- Sample
- synthesized in situ from synthetic wollastonite
Source
- Paper
- Thermal equation of state of CaSiO3 perovskite
- Authors
- Yanbin Wang; Donald J. Weidner; François Guyot
- DOI
- 10.1029/95jb03254
- Year
- 1996
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
"We thus adopt K'_T0 = 4.8 from the above analysis on Mao et al. data in fitting our data with equation (1) to obtain K_T0 = 232(8) GPa and V0 = 45.58(4) Å^3 for our data"; abstract: "K_T0 = 232(8) GPa, K'_T0 = 4.8(3), and V0 = 45.58(4) Å^3".
Additional notes
note
Preferred parameter set of this study; K'_T0 = 4.8 adopted (fixed) from the authors' fit to Mao et al. [1989] data where its uncertainty is 4.8(3). With fixed K'_T0 from 3 to 5, K_T0 ranges 238(7) to 227(7) GPa and V0 ranges 45.58(4) to 45.60(4) Å^3.
dKT dT P
-0.033(8) GPa K^-1
alpha0
3.0 x 10^-5 K^-1
delta T
4.8