12020-65-4Relevant academic research and scientific papers
Cu2S-EuS phase diagram1
Andreev,Ruseikina
, p. 1502 - 1507 (2012)
In the Cu2S-EuS system, a eutectic is formed between Cu2S- and EuS-based solid solutions (ss) at (1069 ± 2) K, 24.5 mol % EuS. EuS dissolves 7.0 (at 1770 K), 5.0 (1170 K), and 3.0 (770 K) mol % Cu2S. A β-Cu2S-based ss is of the open type, has an extent (mol %) of 15.5 (at 1069 K), 7.5 (970 K), 4.5 (770 K), 2.5 (520 K), and 1.5 (379 K) EuS, and melts incongruently at 1186 K, 7.0 mol % EuS. α-Cu2S at 379 K dis- solves 6.5 mol % EuS; γ-Cu2S at (1186 ± 3) K dissolves 3.5 mol % EuS. Pleiades Publishing, Ltd., 2012.
Size-controlled synthesis of quantum-sized EuS nanoparticles and tuning of their Faraday rotation peak
Kataoka, Tomoharu,Tsukahara, Yasunori,Hasegawa, Yasuchika,Wada, Yuji
, p. 6038 - 6040 (2005)
Size-controlled EuS nanoparticles were synthesized by the reaction of europium metal with thiourea as a sulfur source in liq. NH3, whose surface was confirmed to be modified with thiourea by FT-IR measurement, and the opto-magnetic properties (Faraday effect) of the EuS nanoparticles were investigated by using PMMA films containing the nanoparticles, showing that their Faraday rotation peaks were adjustable by control of their particle size. The Royal Society of Chemistry 2005.
Heterometallic Eu/M(II) Benzenethiolates (M = Zn, Cd, Hg): Synthesis, Structure, and Thermolysis Chemistry
Brewer, Meggan,Lee, Jongseong,Brennan, J. G.
, p. 5919 - 5924 (1995)
Europium-mercury amalgam reacts with diphenyl disulfide in THF to give a heterometallic product that crystallizes from pyridine (py) as [(py)3Eu(μ2-SPh)2(μ3-SPh)Hg(SPh)]2.2py (1). Cluster 1 reacts with Cd in pyridine to give [(py)3Eu(μ2-SPh)2(μ3-SPh)Cd(SPh)]2.2py (2) and with Zn in THF to give [(THF)3Eu(μ2-SPh)2(μ3-SPh)Zn(SPh)]2.THF (3). All three compounds have been characterized by NMR, IR, and UV-visible spectroscopy and by single-crystal X-ray diffraction. The three are structurally related; 1 and 2 are isostructural tetrametallic clusters with μ2 and μ3 thiolate ligands connecting the 7-coordinate Eu(II) and tetrahedral group 12 metal ions. The lanthanide coordination sphere is saturated with three neutral pyridine donors, and the group 12 metal ion isbound to a terminal benzenethiolate ligand. The zinc cluster 3 has the same tetrametallic framework and connectivity as 1 and 2 but crystallizes in a different unit cell. The thermolysis products of these compounds have been established: 1 decomposes to give EuS, Ph2S, Hg, and S2Ph2; 2 eliminates Ph2S to give a mixture of CdS and EuS; 3 eliminates Ph2S to give a mixture of EuS and ZnS. Crystal data for 1-3 (Mo Kα radiation, -100°C): 1, triclinic space group P1-, a = 13.954(3) ?, b = 15.311(4) ?, c = 19.666(8) ?, α = 84.54(3)°, β = 86.40(3)°, γ = 87.25(3)°, Z= 2; 2, triclinic space group P1-, a = 13.968(3) ?, b = 15.387(6) ?, c = 19.993(8) ?, α = 84.74(3)°, β = 86.21(3)°, γ = 87.30(3)°, Z = 2; 3, monoclinic space group P21/n, a = 13.920(5) ?, b = 17.049(5) ?, c = 17.823(6) ?, β = 103.7(3)°, Z = 4.
Sulfurization of rare-earth oxides with CS2
Sato, Nobuaki,Shinohara, Genki,Kirishima, Akira,Tochiyama, Osamu
, p. 669 - 672 (2008)
In the scheme of spent fuel reprocessing by using sulfides, selective sulfurization of rare-earths in the fuel is considered followed by either magnetic separation or selective leaching of rare-earth sulfides from uranium oxides such as UO2. In this paper, sulfurization behavior of rare-earth oxides was investigated by XRD and TG methods in the presence of CS2. From the results of thermogravimetric study the sulfurization of europium proceeds as follows; sulfurization from Eu2O3 to Eu3S4 occurs at ca. 400 °C, then the Eu3S4 decomposes to EuS via non-stoichiometric sulfides at temperatures between 450 and 700 °C. From the results of thermogravimetry for Nd2O3, it was found that the weight curve showed monotonic increase from ca. 600 to 1000 °C. At 1000 °C, the value of weight increase was close to that for the formation of Nd2S3 from Nd2O3. The XRD result of the 1000 °C product showed a formation of a single phase of Nd2S3 which is compared with the thermogravimetric result as well as our previous results. The selective sulfurization of rare-earths in the mixture of rare-earth and uranium oxides was discussed by both experimental results and thermodynamical consideration.
Synthesis, structure and physicochemical characterization of a noncentrosymmetric, quaternary thiostannate: EuCu2SnS4
Aitken, Jennifer A.,Lekse, Jonathan W.,Yao, Jin-Lei,Quinones, Rosalynn
, p. 141 - 146 (2009)
EuCu2SnS4 was prepared by a stoichiometric combination of the elements heated to 700 °C for 125 h. The structure was determined by single crystal X-ray diffraction methods. The compound crystallizes in the noncentrosymmetric, orthorh
A novel method for synthesizing EuS nanocrystals from a single-source precursor under white LED irradiation
Hasegawa, Yasuchika,Afzaal, Mohammad,O'Brien, Paul,Wada, Yuji,Yanagida, Shozo
, p. 242 - 243 (2005)
EuS nanocrystals, with an average diameter of 9 nm, have been synthesized by the photolysis of Na[Eu(S2CEt2)4]·3. 5H2O; the first quantum confined particles of EuS to be reported.
Regularities of the property changes in the compounds EuLnCuS3 (Ln = La-Lu)
Ruseikina, Anna V.,Chernyshev, Vladimir A.,Velikanov, Dmitriy A.,Aleksandrovsky, Aleksandr S.,Shestakov, Nikolay P.,Molokeev, Maxim S.,Grigoriev, Maxim V.,Andreev, Oleg V.,Garmonov, Alexander A.,Matigorov, Alexey V.,Melnikova, Ludmila V.,Kislitsyn, Anatoliy A.,Volkova, Svetlana S.
, (2021)
This work contains the results of complex experimental research of the compounds EuLnCuS3 (Ln = La-Lu) enhanced by the DFT calculations. It is aimed at the data replenishment with particular attention to the revelation of regularities in the property changes, in order to extend the potential applicability of the materials of the selected chemical class. The ab initio calculations of the fundamental vibrational modes of the crystal structures were in good agreement with experimental results. The wavenumbers and types of the modes were determined, and the degree of the ion participation in the modes was also estimated. The elastic properties of the compounds were calculated. The compounds were found out to be IR-transparent in the range of 4000–400 cm–1. The estimated microhardness of the compounds is in the range of 2.68–3.60 GPa. According to the DSC data, the reversible polymorphous transitions were manifested in the compounds EuLnCuS3 (Ln = Sm, Gd-Lu): for EuSmCuS3 Tα?β = 1437 K, ΔНα?β = 7.0 kJ·mol-1, Tβ?γ = 1453 K, ΔНβ?γ = 2.6 kJ·mol-1; for EuTbCuS3 Tα?β = 1478 K, ΔНα?β = 1.6 kJ·mol-1, Tβ?γ = 1516 K, ΔНβ?γ = 0.9 kJ·mol-1, Tγ?δ = 1548 K, ΔНγ?δ = 1.6 kJ·mol-1; for EuTmCuS3 Tα?β = 1543 K, Tβ?γ = 1593 K, Tγ?δ = 1620 K; for EuYbCuS3 Tα?β = 1513 K, Tβ?γ = 1564 K, Tγ?δ = 1594 K; for EuLuCuS3 Tα?β = 1549 K, Tβ?γ = 1601 K, Tγ?δ = 1628 K. In the EuLnCuS3 series, the transition into either ferro- or ferrimagnetic states occurred in the narrow temperature range from 2 to 5 K. The tetrad effect in the changes of incongruent melting temperature and microhardness conditioned on rLn3+ as well as influencing of phenomenon of crystallochemical contraction were observed. For delimiting between space groups Cmcm and Pnma in the compounds ALnCuS3, the use of the tolerance factor t’ = IR(A)·IR(C) + a×IR(B)2 was verified.
Anomalous Eu valence state and superconductivity in undoped Eu3Bi2S4F4
Zhai, Hui-Fei,Zhang, Pan,Wu, Si-Qi,He, Chao-Yang,Tang, Zhang-Tu,Jiang, Hao,Sun, Yun-Lei,Bao, Jin-Ke,Nowik, Israel,Felner, Israel,Zeng, Yue-Wu,Li, Yu-Ke,Xu, Xiao-Feng,Tao, Qian,Xu, Zhu-An,Cao, Guang-Han
, p. 15386 - 15393 (2014)
We have synthesized a novel europium bismuth sulfofluoride, Eu3Bi2S4F4, by solid-state reactions in sealed evacuated quartz ampules. The compound crystallizes in a tetragonal lattice (space group I4/mmm, a = 4.0
Crystal structure of EuCeCuS3
Ruseikina
, p. 1403 - 1407 (2016)
The crystal structure of EuCeCuS3, a complex sulfide synthesized for the first time, has been solved using X-ray powder diffraction data. Crystals are rhombic, space group Pnma, Ba2MnS3 structural type, a = 8.1023(1) ?, b = 4.0386(1) ?, c = 15.9022(2) ?, V = 520.36(1) ?3, Z = 4, ρcalcd = 5.767 g/cm3. The Eu,CeS7 polyhedron incorporates the Eu and Ce atoms, which are randomly disordered over two crystallographic sites. The bond lengths dEu,Ce–S range from 2.885 to 3.044 ?.
UV-VIS-NIR luminescence properties of an intense 5d broadband sensitized Eu2SiS4:Er3+ suitable for solar spectral converter
Zhang, Gongguo,Cui, Qiuyu,Liu, Guodong
, p. 39 - 42 (2016)
A novel broadband sensitized near-infrared emitting phosphor, Eu2SiS4:Er3+, was developed as promising solar spectral converter for Si solar cells. Eu2SiS4:Er3+ has broadband absorptions ranging from 250 nm to 550 nm which can efficiently facilitate the UV-green part of the solar photon flux spectrum and exhibits intense NIR emission of Er3+, perfectly matching the maximum spectral response of Si solar cells. The NIR integrated emission intensity of Eu2SiS4:0.02Er3+ is 6.14 times as intense as that of a dual-mode solar spectral converter CaLaGa3S6O:0.01Ce3+, 0.06Pr3+. These results demonstrate that Eu2SiS4:Er3+ phosphor is a promising candidate used as solar spectral converter.
