aragonite-structured CaCO3 (CaCO3-Pnma)
CaCO3
Mie-Grüneisen-Debye / thermal EOS · Cited · 2020
V₀
227.11
ų
Unit cell
K₀
67
GPa
Isothermal
K′
4.740
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 227.11 | 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 |
| CO2 | 1 |
Formula: CaCO3
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- orthorhombic perovskite (Pbnm/Pnma)
- Method
- literature compilation / cited valueliterature-tabulated values used for slab modeling
- Sample
- Table 2 literature values, Litasov et al. (2017)
Source
- Paper
- Thermal equation of state of post-aragonite CaCO3-Pmmn
- Authors
- Mingda Lv; Jiachao Liu; Eran Greenberg; Vitali B. Prakapenka; Susannah M. Dorfman
- DOI
- 10.2138/am-2020-7279
- Year
- 2020
- Journal
- American Mineralogist
- Origin
- Cited (quoted from earlier work)
Evidence from the paper
Table 2: CaCO3-Pnma (Litasov et al. 2017): V0 = 227.11(3), KT0 = 67.0(8), K'0 = 4.74(12), dKT/dT = -0.016(1), a0 = 4.95(22), a1 = 2.77(40), θ0 = 516e, γ0 = 1.39(1), q = 1e.
Additional notes
dKT dT
-0.016(1) GPa×K-1
a0
4.95(22) ×10-5 K-1
a1
2.77(40) ×10-8 K-2
theta0
516 K (fixed)
gamma0
1.39(1)
q
1 (fixed)
context
stable through transition zone and shallow lower mantle; used in slab model below ~45 GPa