Crystal chemistry and compressibility of Fe0.5Mg0.5Al0.5Si0.5O3 and FeMg0.5Si0.5O3 silicate perovskites at pressures up to 95 GPa
10.3389/fchem.2023.1258389 · 2023 · Frontiers in Chemistry
Iuliia Koemets; Biao Wang; Egor Koemets; Takayuki Ishii; Zhaodong Liu; Catherine McCammon; Artem Chanyshev; Tomo Katsura; Michael Hanfland; Alexander Chumakov; Leonid Dubrovinsky
6 EOS records from this paper
| Phase | Composition | Tref | V₀ | K₀ (GPa) | K′ | EOS model | Method note | Origin | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bridgmanite |
|
— | 266.35 ų Unit cell |
211 | 4 | second-order Birch-Murnaghan | — | Original | ||||||||||||
| Why this differs from similar rows: Values for the LiNbO3-type structure, stable below 8+/-2 GPa; sibling row 1294 is the distorted-perovskite phase stable above that transition pressure. | ||||||||||||||||||||
| Bridgmanite |
|
— | 171.2 ų Unit cell |
221 | 4 | second-order Birch-Murnaghan | — | Original | ||||||||||||
| Why this differs from similar rows: Values for the distorted-perovskite phase, stable above 8+/-2 GPa; sibling row 1293 is the lower-pressure LiNbO3-type structure. | ||||||||||||||||||||
| Bridgmanite |
|
— | 181.2 ų Unit cell |
199 | 4 | second-order Birch-Murnaghan | — | Original | ||||||||||||
| Bridgmanite |
|
— | — | 194 | — | second-order Birch-Murnaghan | — | Original | ||||||||||||
| Bridgmanite |
|
— | — | 251 | — | unknown | — | Cited | ||||||||||||
| Bridgmanite |
|
— | — | 259 | — | unknown | — | Cited | ||||||||||||