Iron;samarium | 12518-83-1

• 分子结构分类: 无机化合物 - 均相金属化合物 - 金属间过渡金属化合物
• 英文名称: Iron;samarium
• 英文别名: iron;samarium
• CAS: 12518-83-1
• 化学式: Fe₃Sm
• 分子量: 317.901
• InChiKey: VGKILMGFLYTAFY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  4
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  氮 、 Iron;samarium 以 neat (no solvent) 为溶剂， 生成 铁粉 、 samarium nitride
  参考文献：
  名称：

  Hydrogenation and nitrogenation of SmFe3

  摘要：

  The characteristics of the reactions between SmFe3 and H-2 or N2 were studied by isochorothermal analysis, X-ray diffraction and thermomagnetic analysis. SmFe3 absorbs about 3.1 atoms of hydrogen instantaneously at a temperature between 140 and 170-degrees-C. Subsequent cooling to room temperature causes an increase in the hydrogen concentration to about 4 hydrogen atoms per mole of SmFe3. As the temperature is increased, the SmFe3 hydride begins to desorb hydrogen and its composition becomes SmFe3H0.2 at about 350-degrees-C. The SmFe3 hydride desorbs and absorbs hydrogen reversibly in the temperature range 25-400-degrees-C, with a 16-degrees-C temperature hysteresis occurring between 249 and 233-degrees-C during heating and cooling. At about 425-degrees-C, the hydride begins to decompose into Sm hydride and alpha-Fe. The decomposition reaction is accompanied by a massive hydrogen absorption. The SmFe3 hydride has the rhombohedral crystal structure (same as the parent compound) with a 19% expanded lattice with parameters a = 5.378 angstrom and c = 27.345 angstrom. The stresses introduced by the huge lattice expansion cause the decrepitation of the SmFe3 hydride samples. The Curie temperature and saturation magnetization are 90-degrees-C and 70.8 e.m.u. g-1 for SmFe3H4 compared with 390-degrees-C and 80.6 e.m.u. g-1 for SmFe3. For both SmFe3 and SmFe3 hydride, the easy direction of magnetization is along the crystallographic c axis. SmFe3 powder reacts with N2 at about 250-degrees-C forming SmN, alpha-Sm and alpha-Fe. The final products are SmN and alpha-Fe. No interstitial SmFe3 nitride exists at any temperature.

  DOI：

  10.1016/0925-8388(93)90078-2
• 作为产物：
  描述：

  三氢化钐 、 铁粉 以 melt 为溶剂， 生成 Iron;samarium
  参考文献：
  名称：

  Sm-Fe-Ni三元体系800℃等温截面相图

  摘要：

  摘要 利用粉末X射线衍射和扫描电子显微镜能量色散X射线光谱(SEM/EDS)建立了全浓度范围内Sm-Fe-Ni三元体系800 °C等温截面。所有测量的成分和晶胞精修均在室温下从在 800°C 下退火一周的淬火样品进行。已确认十种二元化合物和α(Fe1-x Nix)（Im-3m-W 型结构）。发现 SmNi5-xFex（P6/mmm-CaCu5 型结构）的溶解度范围为 0 至 50 at% Fe。Fe 在 Sm2Ni7-xFex（P63/mmc-Ce2Ni7 型结构）、SmNi3-xFex（R 3 ¯ m -PuNi3 型结构）和 SmNi2-xFex（Fd-3m-MgCu2 型结构）中在 800 °C 下的最大溶解度为分别约为 2.7 at% Fe、40 at% Fe 和 6.66 at% Fe。Sm2Fe17−xNix（R 3 ¯ m -Th2 Zn17 型结构）的同质域范围为 0 到 21

  DOI：

  10.1016/j.jallcom.2015.11.116

文献信息

• Site Occupancy Determination in Th₂Zn₁₇- and TbCu₇-types Sm₂Fe_{17–<i>x</i>}Co_<i>x</i> Compounds using Synchrotron Resonant Diffraction
  作者：Thomas Bartoli、Jean-Marc Joubert、Karine Provost、Erik Elkaim、Valérie Paul-Boncour、Judith Monnier、Jacques Moscovici、Lotfi Bessais

  DOI：10.1021/acs.inorgchem.0c02884

  日期：2021.2.1

  Sm2Fe17 compounds are high-performance permanent magnets. Cobalt substitution allows us to further improve their magnetic properties. Depending on the thermal treatment, cobalt-substituted compounds can be synthesized either in the TbCu7 (disordered) or in the Th2Zn17 (ordered) structure type. Rietveld refinement of the number of transition metal dumbbells replacing rare-earth atoms from synchrotron

  Sm 2 Fe 17化合物是高性能的永磁体。钴取代使我们可以进一步改善其磁性能。取决于热处理，可以以TbCu 7（无序）或Th 2 Zn 17（有序）结构类型合成钴取代的化合物。同步金属粉末衍射数据对过渡金属哑铃取代稀土原子的数量的Rietveld精炼表明，TbCu 7无序结构具有与有序结构相同的组成（过渡金属与稀土的比率为8.5）。然后，已使用同步加速器共振（异常）衍射确定了两种结构中的钴位点占据率。发现哑铃部位不存在钴。衍射结果已通过Mössbauer光谱确认。
• Changing phase equilibria: A method for microstructure optimization and properties improvement in preparing anisotropic Sm2Fe17N3 powders
  作者：Cifu Lu、Xiufeng Hong、Xiaoqian Bao、Xuexu Gao、Jie Zhu

  DOI：10.1016/j.jallcom.2019.01.098

  日期：2019.5

  Sm2Fe17N3 compound possesses excellent intrinsic permanent magnet properties. Sm2Fe17N3 is usually produced by nitridation of the Sm2Fe17 alloy; however, it is difficult to avoid the formation of alpha-Fe and SmFe3 phases in the Sm-Fe system, which may have adverse effects on the magnetic properties of the final magnets. In this study, the three-phase region of SmCu + SmCu2 +Sm2Fe17 was determined experimentally and a partial isothermal section of the Sm-Fe-Cu phase diagram at 450 degrees C was established. Based on this newly determined three-phase region, a parent alloy free of alpha-Fe and SmFe3 phases was obtained and the effects of Sm-Cu assistant phases on the microstructure and magnetic properties of nitrided powder were investigated. Anisotropic Sm2Fe17N3 powders free of alpha-Fe and having a high (BH)(max) exceeding 31 MGOe and H-cj of 13.9 kOe were obtained using a parent alloy containing 3 at.% of Sm-Cu assistant phases. The magnetization reversal process of anisotropic Sm2Fe17N3 powders with and without alpha-Fe was investigated and the underlying mechanisms were analyzed. (C) 2019 Elsevier B.V. All rights reserved.
• Kost, M. E.; Mikheeva, V. I.; Raevskaya, M. V., Russian Journal of Inorganic Chemistry, 1979, vol. 24, p. 1773 - 1775
  作者：Kost, M. E.、Mikheeva, V. I.、Raevskaya, M. V.、Yaropolova, E. I.、Shilov, A. L.

  DOI：——

  日期：——
• Phase formation and crystal structure of Sm2Fe17−Ga compounds during hydrogen disproportionation and desorption recombination (HDDR-process)
  作者：A. Teresiak、O. Gutfleisch、N. Mattern、B. Gebel、K.-H. Müller

  DOI：10.1016/s0925-8388(02)00490-5

  日期：2002.11

  Hydrogen disproportionation was applied to Sm2Fe17-yGay alloys with y=0, 1, 2 using a hydrogen pressure of up to 3 MPa. SmH2+x and b.c.c. (Fe,Ga) solid solution were formed. Ga is completely dissolved in the b.c.c. Fe. The phase formation was studied as a function of the recombination temperature in the range 600 degreesCless than or equal toT(R)less than or equal to850 degreesC. At first, metastable phases with the disordered hexagonal R1-sT5+2s structure (R=rare earth, T=transition metal) were formed. The atomic positions of the metastable structures were refined using the Rietveld method. In the disordered hexagonal Sm1-s(Fe,Ga)(5+2s) structure the Ga atom occupies randomly the atomic position (3g). The phase transformation of Sm1-sFe5+2s and Sm1-s(Fe,Ga)(5+2s) into the modified rhombohedral Th2Zn17 structure with partial order (denoted m-Sm2Fe17-yGay) starts at T-R greater than or equal to 700 degreesC and T-R greater than or equal to 750 degreesC, respectively. In the case of Sm2Fe15Ga2, the recombination leads to a phase mixture. A lower Ga concentration in the Th2Zn17 structure is observed after recombination compared to that in the initial state. A completely ordered Th2Zn17 structure is not observed after recombination. During recombination of SmH2+x+b.c.c. (Fe,Ga) solid solution at T-R=600degreesC, Ga3Sm5 and GaSm were formed predominantly. (C) 2002 Elsevier Science B.V. All rights reserved.
• Isothermal section of the iron-molybdenum-samarium system at 773 K
  作者：F. A. Agaeva、N. I. Kaloev、I. M. Bigaeva、L. K. Esieva、G. M. Chel’dieva

  DOI：10.1134/s0036023610020233

  日期：2010.2

  Component interactions in the iron-molybdenum-samarium system at 773 K were studied by powder X-ray diffraction, microstructure observation, electron probe microanalysis, and hardness and microhardness testing. The formation of a ternary intermetallic compound. with a ThMn(12) structural type was found in this system. Binary intermetallc compounds were found to interact not only with one another to form two-phase equilibria (Fe(2)Mo + Fe(7)Mo(6), Sm(2)Fe(17) + SmFe(3), SmFe(3) + SmFe(2), and Fe(2)Mo(6) + SmFe(2)) but also with pure components (Fe + Fe(2)Mo, Fe + Sm(2)Fe(17), Mo + Fe(7)Mo(6), Sm + SmFe(2), and Sm + Fe(7)Mo(6)). Three-phase regions were also detected in the isothermal section of the diagram: Fe + Fe(2)Mo + psi, Fe(7)Mo(6) + Fe(2)Mo + psi, Fe(7)Mo(6) + SmFe(2) + psi, and SmFe(3) + SmFe(2) + psi.