Davemaoite
CaSiO3
third-order Birch-Murnaghan · Original · 2000
Why this differs from similar rows?
Fit of earlier 300 K DAC data to 130 GPa (Tamai/Yagi, Yagi, Tarrida/Richet, Mao 1989) with K' assumed=4; authors argue this K0 is biased high by nonhydrostatic stress.
V₀
—
Unknown basis
K₀
280
GPa
Isothermal
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 |
|---|---|
| CaO | 1 |
| SiO2 | 1 |
Formula: CaSiO3
Conditions & method
- Tref
- 300 K
- Pref
- —
- Structure
- cubic perovskite (Pm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)fit of previous 300 K diamond anvil cell static compression data
- Sample
- earlier 300 K DAC static compression data to 130 GPa [Tamai and Yagi, 1989; Yagi et al., 1989; Tarrida and Richet, 1989; Mao et al., 1989]
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
DAC measurements have been performed to 130 GPa at 300 K [Tamai and Yagi, 1989; Yagi et al., 1989; Tarrida and Richet, 1989; Mao et al., 1989]. Fitting these data to (8) yields K_T0 = 280 GPa, assuming K'_T0 = 4.
Additional notes
note
Authors argue this K_T0 is biased high by nonhydrostatic stress; suggested range from LVP, systematics, and first-principles is 230-245 GPa