Davemaoite
CaSiO3
Birch-Murnaghan (order unspecified) · Cited · 1996
Why this differs from similar rows?
Refit of Mao et al. [1989] DAC data (to 134 GPa, no pressure medium) with K0' fixed to 4.0; a different original dataset from the Wang et al. [1996] refit in sibling row 530.
V₀
45.37
ų
Unit cell
K₀
281
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 45.37 | 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
- cubic perovskite (Pm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)room temperature x-ray diffraction in diamond anvil cell without a pressure medium, to 134 GPa (non-hydrostatic, laser-heated to minimize gradients)
- Sample
- Experiment: Mao et al. (1989), constrained fit K0'=4, Table 2
Source
- Paper
- First‐principles calculation of the equation‐of‐state, stability, and polar opt…
- Authors
- A. V. G. Chizmeshya; George H. Wolf; Paul F. McMillan
- DOI
- 10.1029/96gl02624
- Year
- 1996
- Journal
- Geophysical Research Letters
- Origin
- Cited (quoted from earlier work)
Evidence from the paper
'A weighted least-squares fit of these data to a Birch-Murnaghan equation of state yields values of V0 = 45.37(8) Å3 and K0 = 281(4) GPa for the volume and isothermal bulk modulus of CaSiO3 perovskite at ambient pressure (obtained by fixing the pressure derivative of the bulk modulus, K0', to 4.0).' Table 2: Mao et al (1989)*: V0 = 45.37 Å3, K0 = 281 GPa, K0' = 4.00.
Additional notes
reference
Mao et al. [1989]
pressure range
to 134 GPa