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Journal articles on the topic 'Rare earth ions'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Mohammed, Mohanad Hazim, Joseph Horvat, Zhen Xiang Cheng, and Shi Xun Cao. "Robustness in Coupling between Iron and Rare Earth Spins in Rare Earth Orthoferrites." Materials Science Forum 985 (April 2020): 29–34. http://dx.doi.org/10.4028/www.scientific.net/msf.985.29.

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We report on very accurate magnetic measurements on large rare earth orthoferrites single crystals of ErFeO3 and NdFeO3. Our results show that the interaction between rare earth and iron spin system does not change during the spin-flip process. This implies that the coupling between the iron and rare earth spin systems is robust enough to withstand the effects of spin flipping against the magnetic anisotropy energy. This is despite rare eath ions, polarized by the ordered iron ions, being in partly metastable state and their magnetic moment decays with time.

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2

ZHAO, XINWEI, SUSUMU HARAKO, SHINRI NOGUCHI, and SHUJI KOMURO. "SYSTHESIS AND OPTICAL PROPERTIES OF RARE EARTHS DOPED NANO-SEMICONDUCTORS AND THEIR APPLICATIONS." International Journal of Modern Physics B 16, no. 28n29 (2002): 4294–301. http://dx.doi.org/10.1142/s0217979202015297.

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Er and Yb have been doped into nanocrystalline Si and ZnO thin films. Sharp and intense photoluminescence (PL) lines related to intra-4f transitions in the rare earth ions were observed. The optical transition dynamics of the rare earth ions were investigated by time-resolved PL measurements. It was demonstrated that a nano-meter sizing of Si widened the energy bandgap and led to an increase of doping densities of the rare earths. It was also shown that the Er-related PL gave rise to different features under direct and indirect excitations indicating a strong interaction of electron-hole pairs

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3

Morrison, C. A., and D. E. Wortman. "Energy levels of rare-earth ions in rare-earth arsenides." Optical Materials 1, no. 3 (1992): 195–207. http://dx.doi.org/10.1016/0925-3467(92)90028-l.

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4

Bai, Qiongyu, Zhijun Wang, Panlai Li, Shuchao Xu, Ting Li, and Zhiping Yang. "Zn2−aGeO4:aRE and Zn2Ge1−aO4:aRE (RE = Ce3+, Eu3+, Tb3+, Dy3+): 4f–4f and 5d–4f transition luminescence of rare earth ions under different substitution." RSC Advances 6, no. 104 (2016): 102183–92. http://dx.doi.org/10.1039/c6ra21932b.

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Generally, luminescent properties of rare earth ions doped host can be tuned by controlling the host composition, that is, when substituted for different cations of host, the rare earths ions can present different characteristics.

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5

CHOI, YONG GYU. "ENHANCING EMISSION PROPERTIES OF RARE EARTH IONS IN CHALCOGENIDE GLASS VIA MINUTE COMPOSITIONAL ADJUSTMENTS." Journal of Nonlinear Optical Physics & Materials 19, no. 04 (2010): 663–71. http://dx.doi.org/10.1142/s021886351000556x.

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The significant role of the chemical environments of rare earths ions in controlling their radiative and nonradiative processes are exemplified in this study: The emission properties of rare earth ions ( Dy3+ or Tm3+ ) embedded in the strong covalent chalcogenide glass ( Ge and/or As containing sulphide glass) are dramatically enhanced upon the addition of very small amount of the Group III elements ( Ga or In ) and alkali halides ( CsBr or RbBr ). These compositional adjustments alter only the local structural environments of rare earth ions, while thermal stability of the modified glass is k

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6

Yoshimura, Y., Takahiro Oikawa, H. Kanno, and Y. Suzuki. "Coordination of Thiocyanate Ions to Rare Earth Ions in Concentrated Aqueous Rare Earth Thiocyanate Solutions." Materials Science Forum 315-317 (July 1999): 494–99. http://dx.doi.org/10.4028/www.scientific.net/msf.315-317.494.

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7

Wang, Dan, Fuyu Wu, Yunzhang Rao, Zhilian Zhao, Wei Xu, and Min Han. "Microscopic Simulation of RE3+ Migration in Ion-Type Rare Earth Ores Based on Navier–Stokes Equation—Exchange Reaction—Ion Migration Coupling." Metals 14, no. 10 (2024): 1130. http://dx.doi.org/10.3390/met14101130.

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In the in-situ leaching method of ionic rare earth, ion exchange reaction between rare earth ions and leaching agent ions is carried out, which allows the rare earth ions to be leached from the ore body as the leaching solution flows through the pores. This indicates that the leaching process of rare earth ions is closely related to the seepage field, ion exchange field, and ion migration process of the leaching solution. In this study, an ionic rare earth mine located in Longnan of Jiangxi Province was taken as the research object. By conducting nuclear magnetic resonance scanning on the ore

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8

Yao, Yu Yu, Jing Liu, Yong Qiang Wu, Min Min Zheng, and Chun Mei Tang. "Process of Salicylic Acid-Type Composite for Rare Earth Ions." Materials Science Forum 814 (March 2015): 333–37. http://dx.doi.org/10.4028/www.scientific.net/msf.814.333.

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The chelation adsorption behavior of a salicylic acid-type composite ASA-PGMA/SiO2for rare earth ions of the rare earth ore mud leaching solution in Mianning was studied in the present work. The effect of the reaction temperature and medium pH on adsorption properties of the ASA-PGMA/SiO2particle was examined. The concentrations of REEs were determined by ICP-MS. The results showed that the ASA-PGMA/SiO2possessed strong chelation adsorption ability for rare earth ions. The reaction temperature was 50°C, the adsorption properties of the composite were the best and the adsorption rate of rare ea

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9

Gao, Liang, Yan Wang, Jian Oyang, et al. "Removal of Aluminum from Synthetic Rare Earth Leach Solution by Selective Complexation and Turbidity Point Extraction." Minerals 13, no. 12 (2023): 1462. http://dx.doi.org/10.3390/min13121462.

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During the leaching process of ion-adsorbed rare earth ores, large amounts of non-rare earth impurities such as aluminum and iron will be generated. This study selected glutamic acid as a complex agent to selectively calculate aluminum ions; then, added non-ionic surfactants and extract and separate aluminum ions from a rare earth solution using the cloud point extraction method. The effects of solution pH, reaction temperature, equilibration time, amount of glutamic acid, reaction time, and amount of Triton X-114 on aluminum extraction were investigated. The results showed that with a Mglu:MA

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10

Binnemans, Koen. "Stilbazolium dyes containing rare-earth ions." Journal of Alloys and Compounds 303-304 (May 2000): 125–31. http://dx.doi.org/10.1016/s0925-8388(00)00618-6.

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11

Pelletier-Allard, N., and R. Pelletier. "Spectroscopy of photoexcited rare earth ions." Journal of Alloys and Compounds 180, no. 1-2 (1992): 151–55. http://dx.doi.org/10.1016/0925-8388(92)90374-i.

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12

Lezhnina, M. M. "Rare-Earth Ions in Porous Matrices." Physics of the Solid State 47, no. 8 (2005): 1479. http://dx.doi.org/10.1134/1.2014496.

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13

Meijerink, A., C. de Mello Donegá, A. Ellens, J. Sytsma, and G. Blasse. "Vibronic transitions of rare earth ions." Journal of Luminescence 58, no. 1-6 (1994): 26–32. http://dx.doi.org/10.1016/0022-2313(94)90355-7.

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14

Benelli, Cristiano, Andrea Caneschi, Dante Gatteschi, and Luca Pardi. "Magnetic interactions involving rare earth ions." Materials Chemistry and Physics 31, no. 1-2 (1992): 17–22. http://dx.doi.org/10.1016/0254-0584(92)90147-z.

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15

Sou, Watanabe, K. Adya Ashok, Okamoto Yoshihiro, Akatsuka Hiroshi, and Matsuura Haruaki. "Structural analysis on molten rare-earth fluorides." Journal of Indian Chemical Society Vol. 82, Dec 2005 (2005): 1059–63. https://doi.org/10.5281/zenodo.5823766.

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Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1-N 1-10, Ookayama, Meguro-ku, Tokyo 152-8550, Japan Condensed Matter Group, School of Contemporary Sciences, University of Abertay Dundee, Bell Street, Dundee, DD1 1HG, UK Nuclear Science and Energy Directorate, Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki, 319-1195, Japan <em>E-mail</em> : souwata@nr.titech.ac.jp                <em>Fax</em> : 81-3-5734-3057 <em>Manuscript received 6 June 2005</em> Local structures of molten rare earth fluorides LnF<sub>3</sub> (L

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16

Roosen, Joris, Jeroen Spooren, and Koen Binnemans. "Adsorption performance of functionalized chitosan–silica hybrid materials toward rare earths." J. Mater. Chem. A 2, no. 45 (2014): 19415–26. http://dx.doi.org/10.1039/c4ta04518a.

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17

Zhou, Zongke, Quan Wan, Wenbin Yu, et al. "Adsorption Behaviors of Lanthanum (III) and Yttrium (III) Ions on Gibbsite." Minerals 13, no. 12 (2023): 1530. http://dx.doi.org/10.3390/min13121530.

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The enrichment process of rare earth elements in ion-adsorbed rare earth ores and bauxite is potentially related to the adsorption of rare earth elements by gibbsite. In this paper, lanthanum and yttrium were selected as surrogates of light rare earth elements and heavy rare earth elements, respectively. The effects of adsorption time, solution pH, and background electrolyte concentration on the adsorption of rare earth ions by gibbsite were investigated through batch adsorption experiments. The results showed that the adsorption of rare earth ions by gibbsite can approach equilibrium in 72 h.

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18

Wu, Fuyu, Dan Wang, Yunzhang Rao, et al. "Mesoscopic Process Simulation of In Situ Leaching of Ionic Rare Earth Based on NMRI Technology." Adsorption Science & Technology 2023 (March 8, 2023): 1–13. http://dx.doi.org/10.1155/2023/8348431.

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In order to simulate and calculate the leaching process of ionic rare earths more realistically, a digital model of ionic rare earths with real size, shape, seepage channel, and pore ratio and distribution at the mesoscopic scale was constructed based on nuclear magnetic resonance imaging (NMRI) technology. And the in situ leaching mining process was simulated and calculated by using three control equations of solution seepage, ion exchange, and solute migration. The reliability of the NMRI model was verified by the results of the indoor column leaching experiment, and the influence of the inj

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19

Huang, Ying, Ping Long, Guanshi Wang, et al. "Ion-Exchange Model for the Leaching Process of Ion-Adsorption-Type Rare-Earth Ores Considering the Influence of Anions." Minerals 13, no. 12 (2023): 1475. http://dx.doi.org/10.3390/min13121475.

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Clay minerals have a specific adsorption capability for anions, which increases the amount of net negative charge on the surface, leading to the increased adsorption of rare-earth ions in clay minerals and some change from exchangeable to non-exchangeable. Further, anions show a shielding effect on rare-earth ions. The shielding capacity of anions in the leaching agents for rare-earth ions was measured in this study. The relationship between the solid-phase concentration of rare-earth ions shielded and the anion concentration was consistent with the Langmuir model. Based on the Kerr model desc

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20

Li, Jinhui, Yaoru Wen, Yuhang Chu, et al. "Separation of Rare Earth and Aluminum by Selective Complexation." Minerals 12, no. 6 (2022): 743. http://dx.doi.org/10.3390/min12060743.

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The presence of aluminum in the weathering crust leaching rare earth ore harms the subsequent extraction and separation of rare earths. High-quality rare earth production processes must reduce the aluminum content in their feed liquid. Groups containing lone pairs of electrons can form stable insoluble complexes with metal ions under certain conditions. In this paper, 3-hydroxyphenylphosphoryl propionic acid is used to selectively separate rare earths by complexation in feed liquid. The results show that: using 3-hydroxyphenylphosphoryl propionic acid as the complexing agent, and when the amou

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21

Du, Hai Yan, Zhen Xing Liu, and Jia Yue Sun. "Photostimulated Luminescence Studies of Electron Trapping Materials SrS:Eu²⁺,RE (RE= Dy³⁺,Yb³⁺,Pr³⁺,Ho³⁺,Tm³⁺)." Materials Science Forum 663-665 (November 2010): 264–67. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.264.

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Trivalent rare-earth ions, Dy3+, Yb3+, Pr3+, Ho3+, Tm3+, have been investigated as the co-doped auxiliary sensitizer for the electron trapping materials SrS:Eu2+ in order to enhance the fluorescence properties. It is found that Dy3+ and Ho3+ has the optimum photoluminescence stimulated luminescence (PSL) effect among the selected trivalent rare-earth ions. All the SrS: Eu2+ samples coped by different trivalent rare-earth ions can be stimulated by 980 nm laser after exposing to the conventional sun light, and they emit PSL with the peak located at 615 nm. The present research also indicates tha

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22

Pan, Er, Gongxun Bai, Yutao Peng, Liang Chen, and Shiqing Xu. "Promoting luminescence of Yb/Er codoped ferroelectric composite by polarization engineering for optoelectronic applications." Nanophotonics 8, no. 12 (2019): 2215–23. http://dx.doi.org/10.1515/nanoph-2019-0230.

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AbstractFerroelectric oxide nanocrystals, in combination with the robust coupling of an electric field with crystal structure symmetry, makes such systems agreeable to field-induced crystal structural transformation. The luminescent properties of rare earth ions are sensitive to the symmetry of the surrounding crystal field. The luminescence tuning of rare earth ions is an important assignment in the research of luminescent materials. However, the current conditional feasibility and reversibility in the exploration of luminescence modification remain major challenges. In this article, the lumi

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23

Khaironie, Mohamed Takip, Markom Masturah, Meor Yusoff Meor Sulaiman, and Salim Nazaratul Ashifa. "Solvent Extraction of Light Rare Earth Ions Using D2EHPA from Nitric Acid and Sulphuric Acid Solutions." Advanced Materials Research 970 (June 2014): 209–13. http://dx.doi.org/10.4028/www.scientific.net/amr.970.209.

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A study on solvent extraction of a mixture of light rare earths ions (La (III), Nd (III) and Ce (IV)) from nitric and sulphuric acid solutions with di-(2-ethylhexyl) phosphoric acid (D2EHPA) in kerosene as an extractant has been carried out. The influences of D2EHPA and acid concentrations on the extraction efficiency of rare earth metal ions were evaluated. It was found that the extraction percentage of La, Nd and Ce decreased as the acids concentrations increased. On the contrary, the extraction efficiency of these ions increased as D2EHPA concentration increased. The utmost extraction perce

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24

Radzhabov, E. A., and A. V. Samborsky. "Divalent rare-earth ions in LaF3 crystals." Bulletin of the Russian Academy of Sciences: Physics 81, no. 9 (2017): 1058–61. http://dx.doi.org/10.3103/s1062873817090209.

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25

Hengrasmee, Sunantha, and Michael M. Probst. "A Study of Hydrated Rare Earth Ions." Zeitschrift für Naturforschung A 46, no. 1-2 (1991): 117–21. http://dx.doi.org/10.1515/zna-1991-1-219.

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AbstractHydrated lanthanide(III) ions Ln3 + (H2O)8 with Ln3 + = La3 + to Yb3+ have been studied using ab-initio methods. The binding energy as a function of ion-water distance and position of the ion in the rare earth series is discussed. The calculations are related to recent experimental results elucidating the hydration behaviour of lanthanide(III) ions. Since no S-shape behaviour is found for complex binding energies or metal-oxygen distance, the calculations indicate that observed thermodynamic anomalities should come from hydration number changes due to the different ionic radii within t

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26

Heber, J., J. Neukum, M. Altwein, R. Demirbilek, and N. Bodenschatz. "Interaction between excitons and rare-earth ions." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 54, no. 11 (1998): 1557–69. http://dx.doi.org/10.1016/s1386-1425(98)00083-3.

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27

Dong-Ping, Ma, and Xu Yi-Sun. "Multiphonon Nonradiative Transition of Rare-Earth Ions." Communications in Theoretical Physics 4, no. 1 (1985): 1–11. http://dx.doi.org/10.1088/0253-6102/4/1/1.

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28

Heber, J., R. Demirbilek, and S. I. Nikitin. "Excitons and rare-earth ions in CsCdBr3." Journal of Alloys and Compounds 380, no. 1-2 (2004): 50–54. http://dx.doi.org/10.1016/j.jallcom.2004.03.021.

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29

Balcar, E., and S. W. Lovesey. "Neutron-electron spectroscopy of rare-earth ions." Journal of Physics C: Solid State Physics 19, no. 24 (1986): 4605–11. http://dx.doi.org/10.1088/0022-3719/19/24/005.

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30

Paderni, Daniele, Luca Giorgi, Vieri Fusi, Mauro Formica, Gianluca Ambrosi, and Mauro Micheloni. "Chemical sensors for rare earth metal ions." Coordination Chemistry Reviews 429 (February 2021): 213639. http://dx.doi.org/10.1016/j.ccr.2020.213639.

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31

Guessous, A., and K. Matho. "RARE EARTH IONS IN RANDOM CRYSTAL FIELDS." Le Journal de Physique Colloques 46, no. C8 (1985): C8–355—C8–359. http://dx.doi.org/10.1051/jphyscol:1985853.

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32

Herrmann, Andreas, Mohamed Zekri, Ramzi Maalej, and Christian Rüssel. "The Effect of Glass Structure on the Luminescence Spectra of Sm3+-Doped Aluminosilicate Glasses." Materials 16, no. 2 (2023): 564. http://dx.doi.org/10.3390/ma16020564.

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Peralkaline Sm3+-doped aluminosilicate glasses with different network modifier ions (Mg2+, Ca2+, Sr2+, Ba2+, Zn2+) were investigated to clarify the effect of glass composition and glass structure on the optical properties of the doped Sm3+ ions. For this purpose, the Sm3+ luminescence emission spectra were correlated with the molecular structure of the glasses derived by molecular dynamics (MD) simulations. The different network modifier ions have a clear and systematic effect on the peak area ratio of the Sm3+ emission peaks which correlates with the average rare earth site symmetry in the gl

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33

Okamatsu, Toshihiro, Hitoshi Nishimura, Noriyuki Inoue, Harunobu Sano, and Hiroshi Takagi. "The Effect of Rare Earth (Ln = Gd, Dy, Y and Yb) Doping on the Microstructure and Reliability in BaTiO₃-Based Monolithic Ceramic Capacitors (MLCs)." Key Engineering Materials 421-422 (December 2009): 301–4. http://dx.doi.org/10.4028/www.scientific.net/kem.421-422.301.

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The effect of rare earth (Ln = Gd, Dy, Y and Yb) and Mg ions on the microstructure and reliability of BaTiO3-based monolithic ceramic capacitors (MLCs) with Ni electrodes was investigated. The X-ray diffraction results about the lattice volume of sintered specimens suggested that Gd and Dy ions predominatly substituted into the Ba-site, Yb ions gave exclusive substitution at the Ti-site, while Y ions occupied either the Ba- and Ti-site. The reliability of ceramic capacitors was increasing with increasing the ionic radius of the rare earths in this study. The nonlinearity coefficient() etsimat

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34

Dong, Wei, Huimin Wang, Zhoushen Ning, Kaijian Hu, and Xianping Luo. "Bioadsorption of Terbium(III) by Spores of Bacillus subtilis." Minerals 12, no. 7 (2022): 866. http://dx.doi.org/10.3390/min12070866.

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Wastewater containing low concentrations of rare earth ions not only constitutes a waste of rare earth resources but also threatens the surrounding environment. It is therefore necessary to develop environmentally friendly methods of recovering rare earth ions. The spores produced by Bacillus are resistant to extreme environments and are effective in the bioadsorption of rare earth ions, but their adsorption behaviors and mechanisms are not well understood. In this study, the cells and spores of Bacillus subtilis PS533 and PS4150 were used as biosorbents, and their adsorption of terbium ions w

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35

Yu, Qingbo, Meng Wang, Xiujuan Feng, and Xianhui Li. "Research Progress of Rare Earth Metal–Organic Frameworks on Pollutant Monitoring." Chemosensors 13, no. 5 (2025): 184. https://doi.org/10.3390/chemosensors13050184.

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Rare earth metal–organic frameworks (RE-MOFs) are mainly composed of rare earth ions and organic ligands, taking advantage of the strengths of both metal–organic frameworks (MOFs) and rare earth ions. Rare earth ions have the unique feature of unfilled 4f electron shells, which endows them with higher coordination numbers, unique luminescence properties, larger Stokes shifts, longer fluorescence lifetimes, and higher luminescence quantum efficiency. The MOFs combined with a variety of organic ligands can effectively guide the antenna effect to sensitize the rare earth ions and thus enhance the

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36

Cao, Xiaoyan, Chunjie Zhou, Shuai Wang, and Ruilin Man. "Adsorption Properties for La(III), Ce(III), and Y(III) with Poly(6-acryloylamino-hexyl hydroxamic acid) Resin." Polymers 13, no. 1 (2020): 3. http://dx.doi.org/10.3390/polym13010003.

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Using polyacrylic resin followed by the substitution reaction with 6-aminohexyl hydroxamic acid, poly(6-acryloylamino-hexyl hydroxamic acid) resin (PAMHA) was successfully synthesized. PAMHA, a spherical resin with the particle size of 0.4 mm, is a novel polyamide hydroxamic acid chelating resin containing acylamino and hydroxamic acid functional groups. A series of influences (pH, contact time, temperature, and the initial concentrations of rare earth ions) were investigated to determine the adsorption properties. The adsorption capacity for La(III), Ce(III), and Y(III) ions were 1.030, 0.962

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37

Church, Jeffrey S., Noel W. Cant, and David L. Trimm. "Stabilisation of aluminas by rare earth and alkaline earth ions." Applied Catalysis A: General 101, no. 1 (1993): 105–16. http://dx.doi.org/10.1016/0926-860x(93)80141-c.

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38

Nishimura, K. "Nuclear Orientation on Rare Earth Nickel Alloys." Australian Journal of Physics 51, no. 2 (1998): 237. http://dx.doi.org/10.1071/p97047.

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A hyperfine interaction study of the light rare earth elements, Ce, Pr, Nd and Pm, in the rare earth nickel and CeNi2Al5 compounds by means of the low temperature nuclear orientation is summarised. The magnitudes and directions of the magnetic hyperfine fields obtained through measurements of γ-ray anisotropy and angular distributions reveal the magnetic structures of the ions. The experiments extracted peculiar results for the magnetic properties of the ions, and show certain novel features of the technique to the study of solid-state magnetism.

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39

Zhang, Jun, Xiao Ting Shi, Wei Guo, Zhong Zhang, and Hong Yang. "The Difference between Rare Earth Ions and Alkaline Earth Metal Ions in DNA Condensation Process." Materials Science Forum 694 (July 2011): 613–15. http://dx.doi.org/10.4028/www.scientific.net/msf.694.613.

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The structural transition of DNA double-stranded induced by Ce3+ or Mg2+ ions was investigated in this paper. By atomic force microscopy, different types of condensed DNA structures were observed at the presence of Ce3+ or Mg2+ ions. The results show that there are some differences between rare earth ions and alkaline earth metal ions in the DNA condensation process.

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40

Ohto, Keisuke, Shinpei Nakashima, Yudai Tanaka, Shintaro Morisada, Hidetaka Kawakita, and Tatsuya Oshima. "Extraction Behavior of Trivalent Rare Earth Metal Ions with Diphosphonic Acid Type Extraction Reagent." Key Engineering Materials 884 (May 2021): 133–39. http://dx.doi.org/10.4028/www.scientific.net/kem.884.133.

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Bis(phenyl hydrogen phosphonato)-1-hydroxy-3,5,5-trimethylheptane has been prepared to investigate extraction behavior of a series of trivalent rare earth metal ions. This diphosphonic acid extraction reagent exhibited high extraction ability to all ions examined, especially Sc ion. It did not exhibit apparent dependency in acid concentration, which corresponds to ion-exchange mechanism, probably due to extremely high extraction ability. Although the mutual separation of rare earths was difficult with this reagent, group separation of rare earths over divalent base metals can be accomplished.

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41

Ding, Caiping, Xuanyu Cao, Cuiling Zhang, Tangrong He, Nan Hua, and Yuezhong Xian. "Rare earth ions enhanced near infrared fluorescence of Ag2S quantum dots for the detection of fluoride ions in living cells." Nanoscale 9, no. 37 (2017): 14031–38. http://dx.doi.org/10.1039/c7nr04436d.

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We discovered that the fluorescence of Ag<sub>2</sub>S QDs can be enhanced by rare earth ions through AIE and then developed method for F<sup>−</sup> detection based on the coordination of rare earth ions with F<sup>−</sup>.

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42

M., A. ZAYED, S. RIZK M., KHALIFA H., and F. OMER W. "Use of EDTA for Potentiometric Back-titration of Rare Earths and Analysis of their Mixtures." Journal of Indian Chemical Society Vol. 64, Jan 1987 (1987): 49–51. https://doi.org/10.5281/zenodo.6196437.

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Advantage was taken of the stoichiometric reaction between mercury(n), rare earths, alkaline earths, heavy metal ions and EDTA in urotropine buffered media to determine rare earths by back-titration of excess EDT A in the course or estimating a variety or lanthanides or anal) sing their binary mixture with one of the alkalise earth metals by selective control of pH; or analysing their binary mixtures with heavy metals using fluoride as a good m sking agent for rare earths ; or analysing their ternary mixtures with both heavy and alkaline earth metals in two steps, one by selecti

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43

Mathur, S. P., and C. S. Bhandari. "Equilibrium studies on rare-earth chelates: Interactions of rare-earth ions with thioformohydroxamic acid." Recueil des Travaux Chimiques des Pays-Bas 100, no. 2 (2010): 49–51. http://dx.doi.org/10.1002/recl.19811000203.

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Franczak, Agnieszka, Koen Binnemans, and Jan Fransaer Jan Fransaer. "Magnetomigration of rare-earth ions in inhomogeneous magnetic fields." Physical Chemistry Chemical Physics 18, no. 39 (2016): 27342–50. http://dx.doi.org/10.1039/c6cp02575g.

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Dobretsova, Elena, Olimkhon Alimov, Denis Guryev, et al. "Structural and Spectroscopic Features of the Bixbyite-Type Yttrium Scandate Doped by Rare-Earth Ions." Crystals 12, no. 12 (2022): 1745. http://dx.doi.org/10.3390/cryst12121745.

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Yttrium scandate crystal fiber has been obtained through laser-heated pedestal growth. The crystal belongs to a bixbyite crystal structure and crystallizes in Ia3¯ space group. X-ray diffraction method shows a lattice parameter of a = 10.228(1) Å. Factor-group analysis of YScO3 Raman spectra points to high degree of disorder in crystal structure of the new compound. Spectral-kinetic investigation of the crystal fibers doped by rare-earth ions points to the presence of two independent active optical centers of rare-earth ions. Moreover, the character of rare-earth impurities’ distribution is in

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Armellini, C., A. Chiappini, A. Chiasera, et al. "Rare Earth-Activated Silica-Based Nanocomposites." Journal of Nanomaterials 2007 (2007): 1–6. http://dx.doi.org/10.1155/2007/84745.

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Two different kinds of rare earth-activated glass-based nanocomposite photonic materials, which allow to tailor the spectroscopic properties of rare-earth ions: (i) Er3+-activated SiO2-HfO2waveguide glass ceramic, and (ii) core-shell-like structures of Er3+-activated silica spheres obtained by a seed growth method, are presented.

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Kimiaee Asadi, F., N. Lauk, S. Wein, N. Sinclair, C. O'Brien, and C. Simon. "Quantum repeaters with individual rare-earth ions at telecommunication wavelengths." Quantum 2 (September 13, 2018): 93. http://dx.doi.org/10.22331/q-2018-09-13-93.

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We present a quantum repeater scheme that is based on individual erbium and europium ions. Erbium ions are attractive because they emit photons at telecommunication wavelength, while europium ions offer exceptional spin coherence for long-term storage. Entanglement between distant erbium ions is created by photon detection. The photon emission rate of each erbium ion is enhanced by a microcavity with high Purcell factor, as has recently been demonstrated. Entanglement is then transferred to nearby europium ions for storage. Gate operations between nearby ions are performed using dynamically co

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Liu, Wen Hui, Jia Rui Zhang, Gerile Naren, and Aorigele Bohnuud. "Synthesis and Luminescent Properties of TiO<sub>2</sub> Materials Single and Triple Doped with Rare Earth Ions (Sm<sup>3+</sup> , Tb <sup>3+</sup> and Eu<sup> 3+</sup>)." Defect and Diffusion Forum 437 (October 7, 2024): 3–11. http://dx.doi.org/10.4028/p-mxq8kq.

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Four types of titanium dioxide (TiO2) materials doped with a single kind of rare earth ions Ln3+ (Eu3+, Tb3+, or Sm3+) and three rare earth ions (Eu3+, Tb3+, and Sm3+) were synthesized by the sol-gel method. The compositions, structures, and photophysical properties of these compounds were tested. The structure of the rare earth ion-doped TiO2 samples was characterized by X-ray powder diffraction (XRD) and Fourier-transform infrared spectroscopy (FT-IR). Optical absorption and fluorescence information was obtained using UV-Vis spectroscopy and fluorescence spectroscopy. The surface morphology

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Zhou, Min, Zhenglin Liu, Dandan Lu, Jiajun Wang, Zili Chen, and Yunren Qiu. "Synthesis of Acidic Phosphonic Chitosan and the Complexation of La(III) in Acidic Aqueous Solution." Polymers 17, no. 10 (2025): 1341. https://doi.org/10.3390/polym17101341.

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Due to the similar physicochemical properties of rare earth ions, their separation presents significant challenges. In this study, acidic phosphonic chitosan (aPCS) was prepared by modifying chitosan with phosphite and formaldehyde for improving the water solubility and complexing ability of rare earth ions in acidic aqueous solutions. DFT calculations revealed that its phosphonic groups serve as preferred reaction sites, forming stable bidentate complexes with rare earth cations. The complexation abilities of aPCS and phosphorylated chitosan (PCS) for La(III) were compared at various pHs by c

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Liu, Hai, Lixin Yu, Weifan Chen, and Yingyi Li. "The Progress of Nanocrystals Doped with Rare Earth Ions." Journal of Nanomaterials 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/235879.

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In the past decades, TiO2nanocrystals (NCs) have been widely studied in the fields of photoelectric devices, optical communication, and environment for their stability in aqueous solution, being nontoxic, cheapness, and so on. Among the three crystalline phases of TiO2, anatase TiO2NCs are the best crystallized phase of solar energy conversion. However, the disadvantages of high band gap energy (3.2 ev) and the long lifetime of photogenerated electrons and holes limit its photocatalytic activity severely. Therefore, TiO2NCs doped with metal ions is available way to inhibit the transformation f

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