Davemaoite
CaSiO3
third-order Birch-Murnaghan · Original · 2000
Why this differs from similar rows?
This study's own EDXRD LHDAC fit (18-96 GPa) with V0, K0, K' fixed from Shim et al. [2000] static-compression results; only gamma0 and q fitted here.
V₀
27.45
cm³/mol
Molar
K₀
236
GPa
Isothermal
K′
3.900
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 27.45 | cm³/mol | Molar | — |
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
- 300 K
- Pref
- 0.000 GPa
- Structure
- cubic perovskite (Pm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)energy dispersive synchrotron X-ray diffraction in laser-heated diamond anvil cell (LHDAC), 18-96 GPa, 1238-2419 K; combined with LVP data of Wang et al. [1996]
- Sample
- polycrystalline CaSiO3 perovskite synthesized from natural wollastonite (Newburg, NY) + 10 wt% Pt
Source
- Paper
- The stability and P–V–T equation of state of CaSiO3 perovskite in the Earth's l…
- Authors
- Sang‐Heon Shim; T. S. Duffy; Guoyin Shen
- DOI
- 10.1029/2000jb900183
- Year
- 2000
- Journal
- Journal of Geophysical Research Atmospheres
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
By fixing V0 = 27.45 cm3/mol, KTO = 236 GPa, and K'0 = 3.9 from recent static compression data and theta0 = 1000 K, we obtain gamma0 = 1.92 +- 0.05 and q = 0.6 +- 0.3. Table 2 (This Study): V0 = 27.45(2) cm3 mol-1, K_T0 = 236(4) GPa, K'_T0 = 3.9(2).
Additional notes
gamma0
1.92(5)
q
0.6(3)
theta0 K
1000 (assumed)
alpha0 1e-5 K-1
2.2(3)
dKT dT GPa K-1
-0.028(11)
delta T
5.2(21)
note
V0, K_T0, K'_T0 fixed from static compression results of Shim et al. [2000]; only gamma0 and q fitted in this study