Zhongying Mi

Institute of Geochemistry

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S. R. Shieh

Western University

Xi Liu

Peking University

Dayong Tan

Guangzhou Institute of Geochemistry

John S. Tse

University of Saskatchewan

Linada Kaci

Western University

Ignace Jarrige

Brookhaven National Laboratory

Lifei Zhang

Peking University

Weiguang Shi

Northeast Petroleum University

Boris Kiefer

New Mexico State University

A. Kavner

University of California, Los Angeles

Cooperative Institutions

Chinese Academy of Sciences

Western University

Peking University

Argonne National Laboratory

Ministry of Education of the People's Republic of China

Planetary Science Institute

Princeton University

Center for High Pressure Science and Technology Advanced Research

Deutsches Elektronen-Synchrotron DESY

Jilin University

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Elasticity and Structure of Chromite at High Pressure

AGUFM (2012)

S. R. Shieh W. Yong Zhongying Mi S. M. Botis Weigang Shi

Chromite

Elasticity

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Citations (0)

Equation of state of a new calcium magnesium silicate compound with the composition Ca3MgSi2O8 at pressures up to 23 GPa and ambient T

Physics and Chemistry of Minerals (2022)

Zhongying Mi Xinjian Bao Dayong Tan Weiguang Shi Lifei Zhang

Diamond anvil cell

Isothermal process

Calcium silicate

10.1007/s00269-021-01175-1

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Growth of magnesium aluminate nanocrystallites

CrystEngComm (2013)

Dayong Tan Wei Zhou Wenzhu Ouyang Zhongying Mi Lingping Kong

Nanocrystalline magnesium aluminate was synthesized with the coprecipitation method. Its growing behaviors as a function of temperature were studied with synchrotron X-ray diffraction (XRD) and Raman spectroscopy. It is found that the particle growth was greatly inhibited at temperatures below 1000 °C due to the hydroxide precursor reactants. Above 1000 °C, magnesium aluminate nanoparticles start to grow fast. After two hours annealing at 1200 °C, the grain size changes by multiple folds, suggesting that oriented attachment may occur. Above 1200 °C, the grain size changes in various directions are much smaller than the average grain size, indicating the oriented attachment mechanisms become inactive in the growth of MgAl2O4 nanoparticles with sizes larger than 42 nm.

Nanocrystalline material

Coprecipitation

Aluminate

10.1039/c3ce41718b

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Citations (11)

Strength and texture of sodium chloride to 56 GPa

Journal of Applied Physics (2018)

Zhongying Mi S. R. Shieh A. Kavner Boris Kiefer Hans‐Rudolf Wenk

The strength and texture of sodium chloride in the B1 (rocksalt) and B2 (cesium chloride) phases were investigated in a diamond anvil cell using synchrotron X-ray diffraction in a radial geometry to 56 GPa. The measured differential stresses within the Reuss limit are in the range of 0.2 GPa for the B1 phase at pressure of 24 GPa and 1.6 GPa for the B2 phase at pressure of 56 GPa. A strength weakening is observed near the B1-B2 phase transition at about 30 GPa. The low strength of NaCl in the B1 phase confirms that it is an effective pressure-transmitting medium for high-pressure experiments to ∼30 GPa. The B2 phase can be also used as a pressure-transmitting medium although it exhibits a steeper increase in strength with pressure than the B1 phase. Deformation induces weak lattice preferred orientation in NaCl, showing a (100) texture in the B1 phase and a (110) texture in the B2 phase. The observed textures were evaluated by viscoplastic self-consistent model and our results suggest {110}⟨11¯0⟩ as the slip system for the B1 phase and {112}⟨11¯0⟩ for the B2 phase.

Texture (cosmology)

10.1063/1.5022273

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Citations (13)

Equation of State of a Natural Chromian Spinel at Ambient Temperature

Minerals (2018)

Zhongying Mi Weiguang Shi Lifei Zhang S. R. Shieh Xi Liu

A natural chromian spinel with the composition (Mg0.48(3)Fe0.52(3))(Fe0.06(1)Al0.28(1)Cr0.66(2))2O4 was investigated up to 15 GPa via synchrotron X-ray diffraction with a diamond-anvil cell at room temperature. No phase transition was clearly observed up to the maximum experimental pressure. The pressure–volume data fitted to the third-order Birch–Murnaghan equation of state yielded an isothermal bulk modulus ( K T 0 ) of 207(5) GPa and its first pressure derivative ( K T 0 ′ ) of 3.2(7), or K T 0 = 202(2) GPa with K T 0 ′ fixed as 4. With this new experimental result and the results on some natural chromian spinels in the literature, a simple algorithm describing the relation between the K T 0 and the compositions of the natural chromian spinels was proposed. To examine this algorithm further, more compression experiments should be performed on natural chromian spinels with different chemical compositions.

Isothermal process

Diamond anvil cell

10.3390/min8120591

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Citations (6)

Strength, Elasticity and Phase Transition Study on NaCl and MgO-NaCl Mixture to Mantle Pressures

Zhongying Mi

Elasticity

Source

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Citations (1)

Unusual Electronic Structures of CO2 at Deep Mantle Pressures

AGUFM (2011)

S. R. Shieh Ignace Jarrige Nobutaka Hiraoka Maw‐Kuen Wu John S. Tse

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Elasticity and high-pressure behavior of Mg2Cr2O5 and CaTi2O4-type phases of magnesiochromite and chromite

American Mineralogist (2021)

S. R. Shieh Tauhid Belal Khan Zhongying Mi Mauritz van Zyl Ricardo Duménigo Rodríguez

Abstract In situ high-pressure and high-temperature X-ray diffraction studies on magnesiochromite, MgCr2O4, and a natural chromite, (Mg,Fe)(Al,Cr)2O4, using a laser-heated diamond-anvil cell technique were performed at pressures to ~45 GPa. Our results on MgCr2O4 at ~15 GPa showed temperature-induced dissociation of MgCr2O4 to Cr2O3+MgO below ~1500 K and formation of modified ludwigite (mLd)-type Mg2Cr2O5+Cr2O3 above ~1500 K. Above 20 GPa, only a single phase with the CaTi2O4-type structure of MgCr2O4 was observed at 1400–2000 K. A second-order Birch-Murnaghan fit to pressure-volume data for the CaTi2O4-type phase of MgCr2O4 yields zero-pressure volume (V0) = 264.4(8) Å3 and bulk modulus (K0) = 185.4(4) GPa, and for the CaTi2O4-type structure of natural (Mg,Fe)(Al,Cr)2O4 yields V0 = 261(1) Å3 and K0 = 175.4(2) GPa. A second-order Birch-Murnaghan fit to pressure-volume data of mLd-type Mg2Cr2O5 yields V0 = 338.9(8) Å3 and K0 = 186.5(6) GPa. The obtained high-pressure phase relations of chromite spinels can be used as an indicator for shock pressure in impact rocks and meteorites. The bulk moduli of the high-pressure phases of MgCr2O4 and FeCr2O4 can help develop a thermodynamic model for Mg and Fe end-member spinels in the upper mantle and transition zone.

Chromite

Elasticity

10.2138/am-2021-7853

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Citations (1)

Electronic structure of carbon dioxide under pressure and insights into the molecular-to-nonmolecular transition

Proceedings of the National Academy of Sciences (2013)

S. R. Shieh Ignace Jarrige Min Wu Nozomu Hiraoka John S. Tse

Significance In this paper, both oxygen and carbon K -edge spectra of CO 2 polymorphs at high pressure and room temperature were reported. The electronic structure of CO 2 shows remarkable change from molecular to nonmolecular transition. Furthermore, a 532-eV feature was observed only at a limited pressure range from ∼37 to 53 GPa, suggesting the presence of a transient species in the nonmolecular phase.

Carbon fibers

10.1073/pnas.1305116110

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Citations (28)