Mechanisms of rare earth element and aluminum leaching with magnesium sulfate based on coupled seepage–chemical–diffusion simulations in microporous networks来源：Science DirectIn situ leaching of ionic rare earth ore by magnesium sulfate (MgSO4) generally involves long leaching cycles, low leaching rates, low rare earth element concentrations and high contents of impurity ions in the leachate liquor. In this paper, on the basis of the microporous network of rare earth ores and theories of fluid dynamics, chemical reaction kinetics, and mass transfer, we adopt coupled seepage–chemical–diffusion s...
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2026
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来源：Science DirectRare-earth mono-nitrides (REN) are important rare-earth compounds whose structural stability and electronic structure are strongly influenced by localized 4f states. In this work, a first-principles investigation is carried out on NdN, PmN, SmN, EuN, and GdN to examine their structural stability and electronic structure. Density Functional Theory (DFT) calculations using the Quantum Espresso package are employed to investigate the rocksalt (Fm–3m) and CsCl-type (Pm–3m) crystal phases. The calculated lattice parameters are compared with available experimental and theoretical va...
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2026
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来源: Science DirectThe reason for the higher extraction rate of light rare earth elements (LREY) than that of heavy rare earth elements (HREY) during the extraction of rare earth elements (REY) from coal gangue (CG) by the calcination-acid leaching method has rarely been studied in depth. Based on the identification of rare earth minerals in CG, rare earth minerals were synthesized, and calcination-acid leaching experiments were carried out to explore differences in leaching reaction mechanisms between LREY and HREY. X-ray powder diffraction (XRD) analysis shows that rare earth fluorocarbonate ...
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2026
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来源：ACS Publications High-quality single crystals of refractory oxides are essential for fundamental investigations and advanced functional characterization, yet their preparation is frequently limited by demanding precursor processing and the extremely high temperatures required for crystal growth. Here, we present a practical, reproducible, and experimentally accessible protocol for the preparation of rare-earth zirconate A2Zr2O7 single crystals based on direct processing of mixed-oxide precursors using a laser-heated pedestal (modified Czochralski) technique. In contrast to conventi...
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2026
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