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Structure and Freezing of MgSiO3 Liquid in Earth's Lower Mantle
- L. Stixrude, B. Karki
- Chemistry, Medicine
- Science
- 14 October 2005
First-principles molecular-dynamics simulations show that over the pressure regime of Earth's mantle the mean silicon-oxygen coordination number of magnesium metasilicate liquid changes nearly… Expand
Thermodynamics of mantle minerals - II. Phase equilibria
- L. Stixrude, C. Lithgow-Bertelloni
- Geology
- 1 March 2011
P>We complete the development and description of a thermodynamic method for the computation of phase equilibria and physical properties of multiphase mantle assemblages. Our previous paper focused on… Expand
Thermodynamics of mantle minerals – I. Physical properties
- L. Stixrude, C. Lithgow-Bertelloni
- Physics
- 1 August 2005
SUMMARY We present a theory for the computation of phase equilibria and physical properties of multicomponent assemblages relevant to the mantle of the Earth. The theory differs from previous… Expand
The effect of bulk composition and temperature on mantle seismic structure
- W. Xu, C. Lithgow-Bertelloni, L. Stixrude, J. Ritsema
- Geology
- 30 October 2008
Abstract We use a self-consistent thermodynamic formalism to compute the phase equilibria and physical properties of model mantle compositions, demonstrating that the seismological properties of a… Expand
Mineralogy and elasticity of the oceanic upper mantle: Origin of the low‐velocity zone
- L. Stixrude, C. Lithgow-Bertelloni
- Geology
- 1 March 2005
[1] We use a new method to construct an upper mantle model based on self-consistent computation of phase equilibria and physical properties. Computation of the isotropic elastic wave velocities of a… Expand
High-pressure elastic properties of major materials of Earth's mantle from first principles
- B. B. Karki, L. Stixrude, R. Wentzcovitch
- Geology
- 1 November 2001
The elasticity of materials is important for our understanding of processes ranging from brittle failure, to flexure, to the propagation of elastic waves. Seismologically revealed structure of the… Expand
Elasticity of iron at the temperature of the Earth's inner core
- G. Steinle-Neumann, L. Stixrude, R. E. Cohen, O. Gülseren
- Chemistry, Medicine
- Nature
- 6 September 2001
Seismological body-wave and free-oscillation studies of the Earth's solid inner core have revealed that compressional waves traverse the inner core faster along near-polar paths than in the… Expand
High-Pressure Elasticity of Iron and Anisotropy of Earth's Inner Core
- L. Stixrude, R. E. Cohen
- Materials Science, Medicine
- Science
- 31 March 1995
A first principles theoretical approach shows that, at the density of the inner core, both hexagonal [hexagonal close-packed (hcp)] and cubic [face-centered-cubic (fcc)] phases of iron are… Expand
Talc under tension and compression: Spinodal instability, elasticity, and structure
- L. Stixrude
- Geology
- 1 December 2002
[1] Talc occurs as a product of alteration of ultramafic rocks and may be a significant constituent of oceanic lithosphere and the arc mantle wedge. We explore the physical properties and structure… Expand
Viscosity of MgSiO3 Liquid at Earth’s Mantle Conditions: Implications for an Early Magma Ocean
- B. Karki, L. Stixrude
- Materials Science, Medicine
- Science
- 7 May 2010
Mixing the Magma Ocean Molten silicate makes up the majority of the magma we see spewing out of volcanoes, yet the mantle from which these melts originate is largely solid. The high pressures and… Expand