Davemaoite
CaSiO3
second-order Birch-Murnaghan · Original · 1994
V₀
45.83
ų
Unit cell
K₀
280
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 45.83 | 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
- 300 K
- Pref
- —
- Structure
- perovskite (unspecified)
- Method
- experiment (XRD / DAC / multianvil compression)in situ energy-dispersive synchrotron X-ray diffraction, DIA-6 large-volume apparatus (SAM-85), room-temperature decompression, NaCl pressure standard
- Sample
- synthesized in situ from synthetic high-purity wollastonite
Source
- Paper
- Thermoelasticity of CaSiO3 perovskite and implications for the lower mantle
- Authors
- Yanbin Wang; Donald J. Weidner
- DOI
- 10.1029/94gl00976
- Year
- 1994
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
We fit the room-temperature data above 2.0 GPa with a second-order Birch-Murnaghan equation of state, yielding V0 = 45.83(7) Å3 and K0 = 280(23) GPa (K0' is assumed to be 4, as we have only 4 points).
Additional notes
note
Fit restricted to data above 2.0 GPa because amorphization occurs below 2 GPa; only 4 data points used.