Davemaoite
CaSiO3
Birch-Murnaghan (order unspecified) · Original · 2002
V₀
45.58
ų
Unit cell
K₀
255
GPa
Isothermal
K′
4
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 45.58 | 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
- —
- Pref
- —
- Structure
- other / unspecified
- Method
- experiment (XRD / DAC / multianvil compression)high-resolution angle-dispersive synchrotron X-ray diffraction in laser-heated diamond anvil cell, 20-46 GPa
- Sample
- Ca-pv synthesized from natural wollastonite in laser-heated diamond anvil cell, Pt pressure standard, Ar medium
Source
- Paper
- Tetragonal structure of CaSiO3 perovskite above 20 GPa
- Authors
- Sang‐Heon Shim; Raymond Jeanloz; T. S. Duffy
- DOI
- 10.1029/2002gl016148
- Year
- 2002
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
Fitting our data points to the Birch-Murnaghan equation assuming that the pressure derivative of the isothermal bulk modulus is 4 and the volume at ambient conditions is 45.58 Å3 [Wang et al., 1996], the isothermal bulk modulus of Ca-pv is 255 ± 5 GPa; The bulk modulus of the tetragonal phase is 255 ± 5 GPa for K0T' = 4.
Additional notes
V0 source
Wang et al., 1996
pressure range of data
19.7-45.8 GPa
note
V0 taken from literature and held fixed in the fit; all previous measurements were analyzed based on a cubic unit cell whereas this study uses a tetragonal cell