3.65 Å phase
MgSi(OH)6
fourth-order Birch-Murnaghan · Original · 2015
V₀
194.52
ų
Unit cell
K₀
77
GPa
Isothermal
K′
—
dimensionless
Volume (V₀)
| Value | Unit | Basis | Z |
|---|---|---|---|
| 194.52 | 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 | 1 |
| SiO2 | 1 |
| H2O | 3 |
Formula: MgSi(OH)6
Conditions & method
- Tref
- —
- Pref
- —
- Structure
- perovskite (unspecified)
- Method
- experiment (XRD / DAC / multianvil compression)synchrotron angle-dispersive X-ray diffraction in diamond-anvil cell
- Sample
- synthetic powder (synthesized at 425 °C, 10 GPa; Wunder et al. 2011), DAC with Ne medium
Source
- Paper
- Equation of state and elasticity of the 3.65 Å phase: Implications for the X-di…
- Authors
- Mainak Mookherjee; S. Speziale; Hauke Marquardt; Sandro Jahn; Bernd Wunder; Monika Koch‐Müller; Hanns‐Peter Liermann
- DOI
- 10.2138/am-2015-5312
- Year
- 2015
- Journal
- American Mineralogist
- Origin
- Original (measured or fitted in the source paper)
Evidence from the paper
The third- and fourth-order Birch-Murnaghan equation of state fits to the experimental data yield bulk moduli, K0exp of 83 (±1) GPa and 77 (±2.0) GPa, respectively; Table 2 (Experiments, this study): fourth | 194.52a (0.02) | 77 (±2.0) | -0.7(0.2)
Additional notes
table value ambiguity
Table 2 fourth-order row lists '-0.7(0.2)' in the K'/K'' column region; column assignment (K' vs K'') is ambiguous in the reproduced table, so it is not promoted to Kp
note
V0 fixed in fit to measured value of Wunder et al. (2012)