Retrieving "Earths Transition Zone" from the archives
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High Pressure Silicates
Linked via "transition zone"
High-pressure silicates are a class of mineral phases, predominantly polymorphs of silicon dioxide ($\text{SiO}2$) and magnesium iron silicate ($(\text{Mg},\text{Fe})\text{SiO}3$), that exhibit significantly altered crystal structures compared to their ambient-pressure analogues. These phases are stabilized exclusively under extreme lithostatic pressures, typically exceeding 10 $\text{GPa}$, and are foundational to understanding the geophysical and seismological properties of the Earth's lower mantle and transition zone. T…
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High Pressure Silicates
Linked via "Transition Zone"
| Stishovite | $\text{SiO}_2$ | $1.2 - 70$ | 4 | 4.29 |
| Post-Stishovite (P-S) | $\text{SiO}_2$ | $> 70$ | 6 | $\approx 4.8$ |
| Wadsleyite | $(\text{Mg},\text{Fe})2\text{SiO}4$ | $< 530$ (Transition Zone) | Variable | $3.4 - 3.8$ |
| Bridgmanite | $(\text{Mg},\text{Fe})\text{SiO}_3$ | $24 - 120$ (Lower Mantle) | 6 | $4.0 - 4.4$ |