Browsing ELibrary by Author "Fei Y."

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COMPRESSION OF FE3C TO 30 GPA AT ROOM TEMPERATURE

Li J.; Mao H.K.; Fei Y.; Gregoryanz E.; Eremets M.; Zha C.S. (2002)

Polycrystalline Fe3C (cementite) was compressed in a neon pressure medium to 30.5 GPa at 300 K using diamond-anvil cell techniques. Angular dispersive X-ray diffraction of Fe3C was measured using monochromatic synchrotron ...
CONSTRAINING THE EQUATION OF STATE OF FLUID H2O TO 80 GPA USING THE MELTING CURVE, BULK MODULUS, AND THERMAL EXPANSIVITY OF ICE VII

Frank M.R.; Fei Y.; Hu J. (2004)

The study presented here sought to determine the PVT properties of Ice VII at elevated temperatures and pressures up to 60 GPa using a Mao-Bell type diamond anvil cell with an external Mo-wire resistance heater. The unit ...
DETERMINATION OF THE SECOND CRITICAL END POINT IN SILICATE-H2O SYSTEMS USING HIGH-PRESSURE AND HIGH-TEMPERATURE X-RAY RADIOGRAPHY

Mibe K.; Kanzaki M.; Kawamoto T.; Matsukage K.N.; Fei Y.; Ono S. (2004)

To determine the second critical end point in silicate-H2O systems, a new method for the direct observations of immiscible fluids has been developed using a synchrotron X-ray radiography technique. High-pressure and ...
EXPERIMENTAL PARTITIONING OF URANIUM BETWEEN LIQUID IRON SULFIDE AND LIQUID SILICATE: IMPLICATIONS FOR RADIOACTIVITY IN THE EARTH’S CORE

Wheeler K.T.; Walker D.; Fei Y.; Minarik W.G.; McDonough W.F. (2006)

Measurable uranium (U) is found in metal sulfide liquids in equilibrium with molten silicate at conditions appropriate for a planetary magma ocean: 1-10 GPa, 1750-2100 °C, 0-28 wt% S, and fO2 2 log units below IW. However, ...
IN SITU MEASUREMENTS OF THE PHASE TRANSITION BOUNDARY IN MG3AL2SI3O12: IMPLICATIONS FOR THE NATURE OF THE SEISMIC DISCONTINUITIES IN THE EARTH'S MANTLE

Hirose K.; Fei Y.; Ono S.; Yagi T.; Funakoshi K.I. (2001)

Here we report the phase boundary of pyrope garnet (Mg3Al2Si3O12) to Al-bearing silicate perovskite plus corundum, with the highest transition pressure determined by in situ measurements in a multi-anvil apparatus at high ...
LOCATION AND QUANTITATIVE ANALYSIS OF OH IN COESITE

Koch-Muller M.; Fei Y.; Hauri E.; Liu Z. (2001)

The incorporation of hydrogen (deuterium) into the coesite structure was investigated at pressures from 3.1 to 7.5 GPa and temperatures of 700, 800, and 1100 °C. Hydrogen could only be incorporated into the coesite structure ...
MAGNETIC TRANSITION AND SOUND VELOCITIES OF FE3S AT HIGH PRESSURE: IMPLICATIONS FOR EARTH AND PLANETARY CORES

Lin J.-F.; Fei Y.; Mao H.-K.; Hemley R.J.; Sturhahn W.; Zhao J. (2004)

Magnetic, elastic, thermodynamic, and vibrational properties of the most iron-rich sulfide, Fe3S, known to date have been studied with synchrotron Mossbauer spectroscopy (SMS) and nuclear resonant inelastic X-ray scattering ...
MICROSTRUCTURAL STUDY OF SYNTHETIC SINTERED DIAMOND AND COMPARISON WITH CARBONADO, A NATURAL POLYCRYSTALLINE DIAMOND

De S.; Heaney P.J.; Fei Y.; Vicenzi E.P. (2004)

The contributions that Rob Hargraves made to paleomagnetism spanned not only great distances (from the Earth to Mars) but a vast expanse in time. His interests in the magnetic character of the Archean Earth led him to ...
NATURAL HIGH-PRESSURE POLYMORPH OF MERRILLITE IN THE SHOCK VEINS OF THE SUIZHOU METEORITE

Xie X.; Minitti M.E.; Chen M.; Mao H.O.K.; Wang D.; Shu J.; Fei Y. (2002)

A new high-pressure polymorph of merrillite with the structure of trigonal γ-Ca3(PO4)2 was found in the shock-produced veins of the Suizhou meteorite, where it coexists with ringwoodite, majorite, NaAlSi3O8-hollandite, and ...
NATURE OF POLYMERIZATION AND PROPERTIES OF SILICATE MELTS AND GLASSES AT HIGH PRESSURE

Lee S.K.; Cody G.D.; Fei Y.; Mysen B.O. (2004)

The structures of sodium silicate and aluminosilicate glasses quenched from melts at high pressure (6–10 GPa) with varying degrees of polymerization (fractions of nonbridging oxygen) were explored using solid-state NMR ...
OH- IN SYNTHETIC AND NATURAL COESITE

Koch-Müller M.; Dera P.; Fei Y.; Reno B.; Sobolev N.; Hauri E.; Wysoczanski R. (2003)

The incorporation of hydrogen into the coesite structure was investigated at pressures ranging from 4.0–9.0 GPa and temperatures from 750–1300 °C using Al and B doped SiO2 starting materials. The spectra show four sharp ...
PHYSICAL PROPERTIES OF LIQUID FE ALLOYS AT HIGH PRESSURE AND THEIR BEARINGS ON THE NATURE OF METALLIC PLANETARY CORES

Sanloup C.; Gillet P.; Guyot F.; Fei Y. (2002)

Sulfur and silicon are among the expected alloying light elements in planetary liquid iron cores. Structural properties of Fe-27 wt % S and Fe-17 wt % Si liquid alloys at high pressure and high temperature (0-5 GPa/1400-2300 ...
SUBSOLIDUS AND MELTING PHASE RELATIONS OF BASALTIC COMPOSITION IN THE UPPERMOST LOWER MANTLE

Hirose K.; Fei Y. (2002)

The phase relations and the element partitioning in a mid-oceanic ridge basalt composition were determined for both above-solidus and subsolidus conditions at 22 to 27.5 GPa by means of a multianvil apparatus. The mineral ...
SULFUR IN THE EARTH'S INNER CORE

Li J.; Fei Y.; Mao H.K.; Hirose K.; Shieh S.R. (2001)

Experiments have been conducted to study the Fe-S binary phase diagram near the pure iron end member, at pressures between 7 and 25 GPa and temperatures between 1223 and 1473 K. We observed that more than 1 atomic percent ...
TRANSPORT AND STORAGE OF POTASSIUM IN THE EARTH'S UPPER MANTLE AND TRANSITION ZONE: AN EXPERIMENTAL STUDY TO 23 GPA IN SIMPLIFIED AND NATURAL BULK COMPOSITIONS

Konzett J.; Fei Y. (2000)

We have investigated the stability and composition of potassium amphibole and its high-pressure breakdown product phase X in synthetic peralkaline and subalkaline KNCMASH (K 2 O–Na 2 O–CaO–MgO–Al 2 O 3 –SiO 2 –H 2 O) and ...
TRANSPORT AND STORAGE OF POTASSIUM IN THE EARTH?S UPPER MANTLE AND TRANSITION ZONE: AN EXPERIMENTAL STUDY TO 23 GPA IN SIMPLIFIED AND NATURAL BULK COMPOSITIONS

Konzett Ju.; Fei Y. (2000)

We have investigated the stability and composition of potassium amphibole and its high-pressure breakdown product phase X in synthetic peralkaline and subalkaline KNCMASH (K2O–Na2O–CaO–MgO–Al2O3–SiO2–H2O) and natural KLB-1 ...

Browsing ELibrary by Author "Fei Y."

Browsing ELibrary by Author "Fei Y."

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