3.65 Å phase
MgSi(OH)6
third-order Birch-Murnaghan · Original · 2015
V₀
194.52
ų
Unit cell
K₀
83
GPa
Isothermal
K′
4.900
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
well represented by a third-order Birch-Murnaghan formulation, with K0 = 83.0 (±1.0) GPa, K0′ = 4.9 (±0.1), and V0 = 194.52 (±0.02) Å3; Table 2 (Experiments, this study): third | 194.52a (0.02) | 83 (1) | 4.9 (0.2); a The experimental V0 were measured in GFZ (Wunder et al. 2012); In the fit of the experimental data, we fixed the ambient-pressure unit-cell volume ... to the high-precision values determined in our previous study
Additional notes
note
V0 fixed in fit to measured value of Wunder et al. (2012); abstract quotes K0′ = 4.9 (±0.1) while Table 2 gives 4.9 (0.2)
pressure range
up to 41 GPa, compression and decompression
pressure calibrant
ruby fluorescence (Mao et al. 1986); Au in experiment 1