Davemaoite
CaSiO3
Kunc · Original · 2021
V₀
27.403
cm³/mol
Molar
K₀
239
GPa
Isothermal
K′
4.130
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 27.403 | 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
- 298.2 K
- Pref
- 0.000 GPa
- Structure
- cubic perovskite (Pm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)simultaneous optimization of P-V-T X-ray diffraction data and sound velocity/density measurements
- Sample
- Table 1, Ca-Pv column
Source
- Paper
- Equations of State of Ca-Silicates and Phase Diagram of the CaSiO3 System under…
- Authors
- T. S. Sokolova; Peter I. Dorogokupets
- DOI
- 10.3390/min11030322
- Year
- 2021
- Journal
- Minerals
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Table 1. Parameters of equations of state of Ca-silicates at ambient conditions: Ca-Pv CaSiO3: V0 = 27.403 cm3 mol-1, K0 = 239 GPa, K' = 4.13, k = 5. Text: 'K0 is the isothermal bulk modulus under ambient conditions (P0 = 1 bar = 10-4 GPa, T0 = 298.15 K)'; 'all parameters (K0, K', Θ0i, γ0, γ∞ and β) for proposed equation of state were calculated by authors'; 'The proposed equation of state of CaSiO3-perovskite is constructed on the modern P-V-T measurement from [60,61,63] and simultaneous sound velocities and density measurements at pressures up to 23 GPa and temperatures up to 1700 K from [64].'
Additional notes
U0 kJ per mol
-1567.4
k
5
Theta 01 K
935
m1
7.5
Theta 02 K
388
m2
7.5
gamma 0
1.913
gamma inf
0
beta
0.486
notes
Fixed parameter group in the model is (V0, k, mi); fitting parameters are (K0, K', Θ0i, γ0, γ∞, β, a0, m). Ca-Pv is described as one of the main Ca-bearing phases of the Earth's lower mantle; density and adiabatic bulk modulus compared with PREM.