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Hugoniot data for PbF2 single crystals were measured for pressures up to 1 TPa through gas gun and laser shock experiments. Experimental results show that PbF2 transforms to a less compressible phase at 29 GPa and possibly melts at 57 GPa. Quantum molecular-dynamics simulations were also performed to calculated the liquid Hugoniot for PbF2. The simulated results are in good agreement with the experimental results, supporting the high-pressure phase is liquid. The current study, combined with previous studies on TiO2, SiO2, and CaF2, suggests that for AX2 compounds, decreasing of Hugoniot slope can be taken as an indication of melting, and the Hugoniot slope approaches 1.2 at ultrahigh pressure.
Xun Liu; Chang Gao; Tsutomu Mashimo; Norimasa Ozaki; Williams J. Nellis; Gang Yang; Haijun Huang; Shintaro Morioka; Kohei Miyanishi; Takayoshi Sano; Ryosuke Kodama. Shock-induced polymorphic transitions of PbF2 up to 1 TPa and their implications for the universal behavior of shocked AX2 compounds. Physical Review B 2021, 103, 094106 .
AMA StyleXun Liu, Chang Gao, Tsutomu Mashimo, Norimasa Ozaki, Williams J. Nellis, Gang Yang, Haijun Huang, Shintaro Morioka, Kohei Miyanishi, Takayoshi Sano, Ryosuke Kodama. Shock-induced polymorphic transitions of PbF2 up to 1 TPa and their implications for the universal behavior of shocked AX2 compounds. Physical Review B. 2021; 103 (9):094106.
Chicago/Turabian StyleXun Liu; Chang Gao; Tsutomu Mashimo; Norimasa Ozaki; Williams J. Nellis; Gang Yang; Haijun Huang; Shintaro Morioka; Kohei Miyanishi; Takayoshi Sano; Ryosuke Kodama. 2021. "Shock-induced polymorphic transitions of PbF2 up to 1 TPa and their implications for the universal behavior of shocked AX2 compounds." Physical Review B 103, no. 9: 094106.
To constrain the amount of oxygen in Earth's outer core, the equation of sate (EoS) for Fe‐9 wt% O (Fe‐9O) was measured up to ∼246 GPa using the dynamic compression technique. The shock velocity and particle velocity relationship can be described by . Using the ideal mixing model, the isothermal equation of state for Fe‐9O at 300 K was fitted to the third‐order Birch‐Murnaghan EoS with bulk modulus GPa and its pressure derivative . Based on the EoS of Mie‐Grüneisen, the calculated adiabat coincides with our experimental data when its Grüneisen parameters are given by . Using the determined parameters, bulk sound velocities were obtained from the Hugoniot data. By comparing the pressure‐density profiles and sound velocities of Fe‐O system with the preliminary reference Earth model, it was determined that the oxygen‐rich composition does not provide a good match to the observations in the Earth's outer core.
G. Young; Lili Fan; Bin Zhao; Xing Chen; Xun Liu; Haijun Huang. Equation of State for Fe‐9.0 wt% O up to 246 GPa: Implications for Oxygen in the Earth's Outer Core. Journal of Geophysical Research: Solid Earth 2021, 126, 1 .
AMA StyleG. Young, Lili Fan, Bin Zhao, Xing Chen, Xun Liu, Haijun Huang. Equation of State for Fe‐9.0 wt% O up to 246 GPa: Implications for Oxygen in the Earth's Outer Core. Journal of Geophysical Research: Solid Earth. 2021; 126 (2):1.
Chicago/Turabian StyleG. Young; Lili Fan; Bin Zhao; Xing Chen; Xun Liu; Haijun Huang. 2021. "Equation of State for Fe‐9.0 wt% O up to 246 GPa: Implications for Oxygen in the Earth's Outer Core." Journal of Geophysical Research: Solid Earth 126, no. 2: 1.
For the first time, a field survey was conducted to investigate the present situation, vertical distribution and ecological risks of heavy metals (Cu, Zn, Mn, Cr, Pb and As) from 21 in-situ samples drilled out from Yeshan iron mine tailings in the Jiangsu Province of China. The heavy metal contents obtained for the tailing wastes in decreasing order were as follows: Mn > Cu > Zn > As > Cr > Pb. The contents of heavy metals varied with depth, and the variation trends were not completely consistent. Vertical distribution profiles showed that heavy metals accumulated in certain strata. Both the monomial potential ecological risk factor (E) and the risk quotient (RQ) showed a high ecological risk for Cu, Mn and As. The comprehensive ecological risk index (RI) also indicated that the wastes presented a high ecological risk level, to which Cu, Mn and As were the key contributors. Our study showed that the health of individuals, especially children, living in the mining-impacted areas could be affected by the potential noncarcinogenic risk of copper, manganese and the carcinogenic risk of arsenic.
G. Young; Yanqing Chen; Mei Yang. Concentrations, distribution, and risk assessment of heavy metals in the iron tailings of Yeshan National Mine Park in Nanjing, China. Chemosphere 2021, 271, 129546 .
AMA StyleG. Young, Yanqing Chen, Mei Yang. Concentrations, distribution, and risk assessment of heavy metals in the iron tailings of Yeshan National Mine Park in Nanjing, China. Chemosphere. 2021; 271 ():129546.
Chicago/Turabian StyleG. Young; Yanqing Chen; Mei Yang. 2021. "Concentrations, distribution, and risk assessment of heavy metals in the iron tailings of Yeshan National Mine Park in Nanjing, China." Chemosphere 271, no. : 129546.
Haijun Huang; Chunwei Leng; Qingsong Wang; Gang Young; Xun Liu; Ye Wu; Feng Xu; Yingwei Fei. Equation of State for Shocked Fe‐8.6 wt% Si up to 240 GPa and 4,670 K. Journal of Geophysical Research: Solid Earth 2019, 124, 8300 -8312.
AMA StyleHaijun Huang, Chunwei Leng, Qingsong Wang, Gang Young, Xun Liu, Ye Wu, Feng Xu, Yingwei Fei. Equation of State for Shocked Fe‐8.6 wt% Si up to 240 GPa and 4,670 K. Journal of Geophysical Research: Solid Earth. 2019; 124 (8):8300-8312.
Chicago/Turabian StyleHaijun Huang; Chunwei Leng; Qingsong Wang; Gang Young; Xun Liu; Ye Wu; Feng Xu; Yingwei Fei. 2019. "Equation of State for Shocked Fe‐8.6 wt% Si up to 240 GPa and 4,670 K." Journal of Geophysical Research: Solid Earth 124, no. 8: 8300-8312.
G. Young; Xun Liu; Chunwei Leng; Jun Yang; Haijun Huang. Refractive index of [100] lithium fluoride under shock pressures up to 151 GPa. AIP Advances 2018, 8, 125310 .
AMA StyleG. Young, Xun Liu, Chunwei Leng, Jun Yang, Haijun Huang. Refractive index of [100] lithium fluoride under shock pressures up to 151 GPa. AIP Advances. 2018; 8 (12):125310.
Chicago/Turabian StyleG. Young; Xun Liu; Chunwei Leng; Jun Yang; Haijun Huang. 2018. "Refractive index of [100] lithium fluoride under shock pressures up to 151 GPa." AIP Advances 8, no. 12: 125310.
We report a type of high-magnesium and low-silicon iron ore tailings (IOT) utilized as a raw material replacing clay to produce cement clinkers by conventional sintering process. Properties of the cement clinkers sintered at 1420 °C with different IOT addition, from 0 to 20 wt%, were investigated. The chemical and mineralogical analysis, and microscopic examination showed that IOT addition, up to 10 wt%, has little effect on formation of mineralogical phases. Furthermore, physico-mechanical tests showed the IOT addition within 10 wt% did not negatively affect the quality of the produced cement clinkers, on the contrary, could produce better quality clinkers than without IOT. These findings suggest that the high-magnesium and low-silicon IOT has a huge potential as cement raw materials instead of partial natural resources.
G. Young; Mei Yang. Preparation and characterization of Portland cement clinker from iron ore tailings. Construction and Building Materials 2018, 197, 152 -156.
AMA StyleG. Young, Mei Yang. Preparation and characterization of Portland cement clinker from iron ore tailings. Construction and Building Materials. 2018; 197 ():152-156.
Chicago/Turabian StyleG. Young; Mei Yang. 2018. "Preparation and characterization of Portland cement clinker from iron ore tailings." Construction and Building Materials 197, no. : 152-156.
Using the dynamic compression technique, the sound velocities of Fe‐11.8 wt % S were measured up to 211.4 (4.5) GPa and 6,150 K. Discontinuities both in shock velocity and sound velocity indicate that Fe‐11.8 wt % S completely melts at a pressure of 111.3 (2.3) GPa. By the energy conservation law, the calculated liquidus temperature is about 2,500 (300) K. Extrapolated to the inner‐core boundary based on the Lindeman law, the liquidus temperature of Fe‐11.8 wt % S is 4,300 (300) K. We developed a thermodynamic model fit to the experimental data, which allows calculation of the densities and sound velocities of liquid Fe‐S under core conditions. For liquid Fe‐11.8 wt % S and Fe‐10 wt % S, good agreement was achieved between the extrapolations using our model and experimental measurements at very low pressure. Under the conditions of the outer core, the densities and bulk sound velocities of Fe‐10 wt % S provide a good fit to observed seismic profiles of Earth's core. Our results imply that an upper limit of 10 wt % S content in Earth's core satisfies the geophysical constraints. Simultaneously considering other geochemical constraints, the outer core may contain about 6 wt % sulfur and 4 wt % silicon.
H. Huang; C. Leng; Q. Wang; G. Yang; X. Hu; Y. Wu; X. Liu; Y. Fei. Measurements of Sound Velocity of Liquid Fe-11.8 wt % S up to 211.4 GPa and 6,150 K. Journal of Geophysical Research: Solid Earth 2018, 123, 4730 -4739.
AMA StyleH. Huang, C. Leng, Q. Wang, G. Yang, X. Hu, Y. Wu, X. Liu, Y. Fei. Measurements of Sound Velocity of Liquid Fe-11.8 wt % S up to 211.4 GPa and 6,150 K. Journal of Geophysical Research: Solid Earth. 2018; 123 (6):4730-4739.
Chicago/Turabian StyleH. Huang; C. Leng; Q. Wang; G. Yang; X. Hu; Y. Wu; X. Liu; Y. Fei. 2018. "Measurements of Sound Velocity of Liquid Fe-11.8 wt % S up to 211.4 GPa and 6,150 K." Journal of Geophysical Research: Solid Earth 123, no. 6: 4730-4739.
We report Hugoniot measurements on a mixture of cubic boron nitride (cBN) and hexagonal boron nitride (hBN, ∼10% in weight) to investigate the shock compression behavior of BN at Hugoniot stresses up to 110 GPa. We observed a discontinuity at ∼77 GPa along the Hugoniot and interpreted it as the manifestation of the shock-induced phase transition of hBN to cBN. The experimental stress at 77–110 GPa shows significant deviation from the hydrodynamic Hugoniot of cBN calculated using the Mie-Grüneisen model coupled with the reported 300 K-isotherms of cBN. Our investigation reveals that material strength in cBN increases with the experimental stress at least up to 110 GPa. The material strength might be preserved at higher stress if we consider the previously reported high stress data.
Xiaojun Hu; Gang Yang; Bin Zhao; Peiyun Li; Jun Yang; Chunwei Leng; Hanyu Liu; Haijun Huang; Yingwei Fei. Shock compression behavior of a mixture of cubic and hexagonal boron nitride. Journal of Applied Physics 2018, 123, 175903 .
AMA StyleXiaojun Hu, Gang Yang, Bin Zhao, Peiyun Li, Jun Yang, Chunwei Leng, Hanyu Liu, Haijun Huang, Yingwei Fei. Shock compression behavior of a mixture of cubic and hexagonal boron nitride. Journal of Applied Physics. 2018; 123 (17):175903.
Chicago/Turabian StyleXiaojun Hu; Gang Yang; Bin Zhao; Peiyun Li; Jun Yang; Chunwei Leng; Hanyu Liu; Haijun Huang; Yingwei Fei. 2018. "Shock compression behavior of a mixture of cubic and hexagonal boron nitride." Journal of Applied Physics 123, no. 17: 175903.
The processing mineralogy characteristics of an oxidized lead-zinc ore from Sichuan were studied systematically using numerous modern instruments. Results showed that lead and zinc oxide content in the ore exceeded the minimum industrial grade, and also included a relatively high concentration of silver and iron. This ore is composed of many different minerals. Major zinc-containing minerals include sphalerite, hemimorphite, smithsonite, hydrozincite, zinc-containing baileychlore, and zinc-containing dolomite and calcite. Lead-containing minerals are primarily galena and cerussite with small amounts of dechenite, cesaronite, anglesite, limonite and coronadite. Gangue minerals include dolomite and calcite. Dissemination size for the main minerals ranges from medium (0.04 mm) to fine (0.02 mm). All the valuable minerals are well liberated, including galena, sphalerite, cerussite, calamine, and smithsonite. However, the dissemination relationships are complex. Lead is concentrated mainly in galena and cerussite, while zinc occurs primarily in sphalerite, calamine, and smithsonite. The theoretical recovery for lead and zinc were estimated at 72% and 67%, respectively.
Mei Yang; Wending Xiao; Xiang Yang; Patrick Zhang. Processing Mineralogy Study on Lead and Zinc Oxide Ore in Sichuan. Metals 2016, 6, 93 .
AMA StyleMei Yang, Wending Xiao, Xiang Yang, Patrick Zhang. Processing Mineralogy Study on Lead and Zinc Oxide Ore in Sichuan. Metals. 2016; 6 (4):93.
Chicago/Turabian StyleMei Yang; Wending Xiao; Xiang Yang; Patrick Zhang. 2016. "Processing Mineralogy Study on Lead and Zinc Oxide Ore in Sichuan." Metals 6, no. 4: 93.