Iron;samarium | 12023-79-9

• 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: 12023-79-9
• 化学式: Fe₅Sm₀
• 分子量: 416.835
• InChiKey: CMGMFNWRFUZRCM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  6
• 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

• 作为产物：
  描述：

  在 H₂ 作用下， 以 neat (no solvent) 为溶剂， 生成 Iron;samarium 、 Iron;samarium 、 Iron;samarium
  参考文献：
  名称：

  Phase formation and crystal structure of Sm2Fe17−Ga compounds during hydrogen disproportionation and desorption recombination (HDDR-process)

  摘要：

  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.

  DOI：

  10.1016/s0925-8388(02)00490-5

文献信息

• 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.