Journal ArticleDOI
Synthesis of a perovskite-type polymorph of CaSiO3
Lin-Gun Liu,A.E. Ringwood +1 more
TLDR
In this paper, a cubic perovskite-type 3olymorph of CaSiO 3 has been obtained from synthetic crystalline (wollastonite) and glass forms of the material and has been compressed to loading pressures above 160 kbar and heated to about 1500° C by a laser in a diamond anvil cell.About:
This article is published in Earth and Planetary Science Letters.The article was published on 1975-12-01. It has received 225 citations till now. The article focuses on the topics: Perovskite (structure) & Stishovite.read more
Citations
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Postspinel transformations in the system Mg2SiO4‐Fe2SiO4 and some geophysical implications
Eiji Ito,Eiichi Takahashi +1 more
TL;DR: In this article, the phase boundaries between ilmenite-perovskite in MgSiO3 and between Mg2SiO4 spinel and MgO periclase were determined using a uniaxial split-sphere apparatus.
Journal ArticleDOI
The Elastic Properties of Composite Materials
TL;DR: In this paper, the problem of determining the elastic properties of composite materials (polycrystals, polycrystals and porous or cracked solids) is approached in several ways, via scattering theory, through variational principles, or by the assumption of specific geometries for the material under consideration.
Journal ArticleDOI
Liquid fragility and the glass transition in water and aqueous solutions.
TL;DR: C. Angell was born in Canberra, Australia, and studied chemistry and metallurgy at the University of Melbourne, and is focusing on the annealing behavior of hyperquenched liquids and solutions, particularly denatured protein solutions, with a sideline on nanoporous network glasses as gas storage media.
Journal ArticleDOI
Phase transformations and their bearing on the constitution and dynamics of the mantle
TL;DR: The bulk chemical composition of pyrolite is derived from experimental and petrological studies of the complementary relationships between basaltic magmas and refractory peridotites as discussed by the authors.
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Phase transformations in subducted oceanic crust and buoyancy relationships at depths of 600–800 km in the mantle
Tetsuo Irifune,A.E. Ringwood +1 more
TL;DR: The phase transformations in a representative oceanic crust composition (MORB) have been studied at pressures up to 28 GPa, at 1200°C and 1500°C using a multi-anvil apparatus.
References
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Journal ArticleDOI
Phase transformations and the constitution of the mantle
TL;DR: In this article, the authors present a review of the constitution of the mantle between depths of 200 and 1200 km in the light of recent high pressure experimental investigations on silicates and on their germanate analogues, concluding that the rapid increase of seismic velocity around 350-450 km is caused mainly by the transformation of olivine into a spinel-like structure and by transformation of pyroxenes into a new kind of garnet structure characterized by octahedral coordination of a substantial proportion of silicon atoms.
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X‐Ray Diffraction and Optical Observations on Crystalline Solids up to 300 kbar
TL;DR: In this paper, a diamond anvil driven by a simple piston and screw device has been used to subject solid samples to pressures up to 300 kbar at ambient room temperature at room temperature.
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Silicate perovskite from phase transformations of pyrope‐garnet at high pressure and temperature
TL;DR: In this paper, both natural and synthetic pyrope has been compressed to pressures above 300 kbar in a diamond-anvil press and heated to temperatures above 800°C by a continuous YAG laser.
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Synthesis of majorite and other high pressure garnets and perovskites
A.E. Ringwood,Alan Major +1 more
TL;DR: In this paper, a series of new high pressure garnets containing sodium and/or titanium was synthesized at a pressure of 250-300 kb of the majorite, previously found to occur as a shock produced phase in a chondritic meteorite.
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Some high-pressure transformations of geophysical significance
A.E. Ringwood,Alan Major +1 more
TL;DR: In this article, Stishov et al. used an investigat ion of the s tab i l i t i es of s t ruc tu ra l analogues (pa r t i cu la r ly germana tes ) of common s i l I ca te m i n e r a l s at high p r e s s s u r e r s s ǫ e s at which new dense phases occur.