Enstatite is a mineral; the magnesium endmember of the pyroxene silicate mineral series enstatite (MgSiO 3) – ferrosilite (FeSiO 3). The magnesium rich members of the solid solution series are common rock-forming minerals found in igneous and metamorphic rocks. The intermediate composition, (Mg,Fe)SiO.

Feb 9, 2021 · Here, we report an unprecedently high melting temperature of MgSiO3 at 500 GPa by direct shockwave loading of pre-synthesized dense MgSiO3 (bridgmanite) using the Z Pulsed Power Facility.

Post-perovskite (pPv) is a high-pressure phase of magnesium silicate (MgSiO 3). It is composed of the prime oxide constituents of the Earth's rocky mantle (MgO and SiO 2), and its pressure and temperature for stability imply that it is likely to occur in portions of the lowermost few hundred km of Earth's mantle.

Results demonstrate that MgSiO 3 perovskite transforms to a new high-pressure form with stacked SiO 6 -octahedral sheet structure above 125 gigapascals and 2500 kelvin (2700-kilometer depth near the base of the mantle) with an increase in density of 1.0 to 1.2%.

Jan 14, 2009 · We present new equation-of-state (EoS) data acquired by shock loading to pressures up to 245 GPa on both low-density samples (MgSiO3 glass) and high-density, polycrystalline aggregates (MgSiO3 perovs...

Mar 1, 2011 · Liquid MgSiO 3 is a model for the Earth’s magma ocean and of remnant melt present near the core–mantle boundary.

Oct 14, 2005 · Here, we present FPMD simulations of MgSiO 3 liquid over the pressure-temperature range of Earth's mantle, based on density functional theory in the local density approximation and the plane-wave pseudopotential method (4). The simulations are performed in the canonical ensemble with periodic boundary conditions and a Nosé thermostat (5).

Mar 7, 2016 · The MgSiO 3 post-perovskite phase is the most abundant silicate phase in a super-Earth’s mantle, although it only exists within the Earth’s lowermost mantle.

We use density functional theory molecular dynamics (DFT-MD) and path integral Monte Carlo (PIMC) simulations to generate a consistent equation of state (EOS) for liquid MgSiO3 that spans across a wide range of temperatures and pressures.

Jul 22, 2004 · Here, using ab initio simulations and high-pressure experiments, we show that at pressures and temperatures of the D″ layer, MgSiO 3 transforms from perovskite into a layered CaIrO 3 -type...