Davemaoite
Ca 0.98(3), Al 0.03(0), Si 0.99(2), Mg 0.005(4) per formula unit (O = 3); nearly pure CaSiO3
none (not an EOS fit) · Original · 2025
V₀
45.16
ų
Unit cell
K₀
—
K′
—
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 45.16 | 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 |
|---|---|
| MgO | 0.005 |
| CaO | 0.98 |
| Al2O3 | 0.015 |
| SiO2 | 0.99 |
Formula: Ca 0.98(3), Al 0.03(0), Si 0.99(2), Mg 0.005(4) per formula unit (O = 3); nearly pure CaSiO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- cubic perovskite (Pm-3m)
- Method
- experiment (XRD / DAC / multianvil compression)selected area electron diffraction (SAED) in TEM, camera length calibrated with Si standard and coexisting Bdm c-axis
- Sample
- Run Iris-1272, synthesized at 40 GPa and 2,000°C, quenched to ambient conditions
Source
- Paper
- First Observation of Quenched Davemaoite to Ambient Conditions: Its Electron Di…
- Authors
- Nοbuyοshi Miyajima; Lin Wang; Tomoo Katsura
- DOI
- 10.1029/2025gl115280
- Year
- 2025
- Journal
- Geophysical Research Letters
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
A refined lattice parameter from the SAED pattern is a (cubic) = 0.3561(4) nm and the volume V0 = 45.16(10) Å3 (27.19 cm3/mol).
Additional notes
a cubic
0.3561(4) nm
molar volume
27.19 cm3/mol
density crystalline Dvm
4.27 g/cm3
note
Volume possibly under a residual pressure of 1.2(10) GPa within the recovered Dvm-Bdm aggregate