Germane--manganese (2/5) | 12025-50-2

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 各种混合金属/非金属
• 英文名称: Germane--manganese (2/5)
• 英文别名: germane;manganese
• CAS: 12025-50-2
• 化学式: Ge₂Mn₅
• 分子量: 419.87
• InChiKey: UXBAPJOYGCJCTN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -2.92
• 重原子数：
  7
• 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：

  锰 、 锗烷 以 melt 为溶剂， 反应 96.0h， 生成 Germane--manganese (2/5)
  参考文献：
  名称：

  Magnetocaloric effect of Mn5+xGe3−x alloys

  摘要：

  Magnetic properties and magnetocaloric effect (MCE) of off-stoichiometric Mn5+xGe3-x (x = -0.1 and 0.3) were studied. Depletion of Mn (x = -0.1) decreased the magnetic moment of the compound due to the reduction of the ferromagnetic Mn-Mn interactions. Mn5.1Ge2.9 appeared to be near the optimal composition since Mn5.1Ge2.9 exhibited increase in the magnetic moment compared to the stoichiometric compound and further Mn-enrichment beyond x = 0.1 led to the formation of the weakly magnetic secondary phase. Mn5.1Ge2.9 produced the maximum entropy change of 2.9 J kg (1) K (1) at 296 K and the refrigeration capacity of 44.5 J kg (1) with an applied field of 10 kOe, making Mn5.1Ge2.9 a possible candidate magnetic refrigerant with reasonably high magnetic entropy change and negligible hysteresis. (C) 2014 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jallcom.2014.09.034

文献信息

• Investigation of phase equilibria in the quaternary Ce–Mn–In–Ge system and isothermal sections of the boundary ternary systems at 800 °C
  作者：Anton O. Oliynyk、Kadar Djama-Kayad、Arthur Mar

  DOI：10.1016/j.jallcom.2014.10.170

  日期：2015.2

  Ce–Mn–Ge system deserves particular attention because the phase equilibria are complex. Relative to the previously reported phase diagram evaluated at a lower temperature (400 °C), three ternary phases (CeMn 2 Ge 2 , Ce 2 MnGe 6 , and CeMnGe) persist, Ce 2 MnGe 5 does not form, and two new phases with very close composition (Ce 3 Mn 2 Ge 3 and Ce 43 Mn 18 Ge 39 ) appear at 800 °C. Ce 3 Mn 2 Ge 3 (orthorhombic

  摘要 通过粉末 X 射线衍射和能量色散 X 射线分析检查了四元 Ce-Mn-In-Ge 相图的一部分。发现了两个新的四元（Ce 4 Mn 2 InGe 4 和Ce 2 Mn 2 InGe 2 ）和两个三元（Ce 3 Mn 2 Ge 3 和Ce 43 Mn 18 Ge 39 ）相。边界三元系统（Ce-Mn-In、Mn-In-Ge、Ce-In-Ge 和 Ce-Mn-Ge）的等温截面在 800 °C 下确定。其中，Ce-Mn-Ge 系统值得特别关注，因为相平衡是复杂的。相对于先前报道的在较低温度 (400 °C) 下评估的相图，三个三元相（CeMn 2 Ge 2 、Ce 2 MnGe 6 和 CeMnGe）仍然存在，Ce 2 MnGe 5 没有形成，两个新相与非常接近的成分（Ce 3 Mn 2 Ge 3 和Ce 43 Mn 18 Ge 39 ）出现在800 °C 时。Ce 3 Mn 2 Ge 3
• Magnetocaloric refrigerant with wide operating temperature range based on Mn5−Ge3(Co,Fe) composite
  作者：Yongdeok Kim、Ki Hoon Kang、Ju Hwan Kim、Eun Jeong Kim、Kwangseok Choi、Won Bae Han、Hee-Soo Kim、Yoong Oh、Chong Seung Yoon

  DOI：10.1016/j.jallcom.2015.05.061

  日期：2015.9

  The Curie temperature of Mn5Ge3 was raised or lowered by alloying the compound with Fe or Co; hence, the temperature at which maximum magnetocaloric effect manifested was easily manipulated by forming Mn5-xGe3(Co,Fe)(x), alloys to ultimately develop a composite magnetic refrigerant consisting of multiple Mn5Ge3 - based alloys. The composite refrigerant was designed to produce a table-like Delta S-M-T curve and to maximize the RC value near room temperature. Linear combination of the Delta S-M-T curves for the constituent materials showed that a composite composed of physical mixture of four different Mn5Ge3-based compounds: Mn5Ge3, Mn5.1Ge2.9, Mn4.75Co0.25Ge3 and Mn4.75Fe0.25Ge3, generated an optimal Delta S-M-T curve with a table-like shape. The composite refrigerant with refrigeration capacity of 52 J kg(-1), peak entropy change at 300 K, and operating temperature range of 45 K under Delta H = 10 kOe was suitable for room-temperature magnetic refrigeration. Moreover, by changing the relative fraction of each constituent material in the composite, it was shown that the operating temperature range could be fine-tuned as needed. The calculated Delta S-M-T curve for the composite refrigerant by linear combination reasonably well matched the experimental Delta S-M-Tcurve estimated from the M-H curves of the composite refrigerant, suggesting that the simple linear combination of the experimental Delta S-M-T curves can be used to predict the performance of the composite magnetic refrigerants whose MCE was originated from the second order magnetic transition. In conclusion, being rare-earth free and lacking thermal or magnetic hysteresis, the Mn5Ge3 - based composite can be a competitive candidate magnetic refrigerant material operating at room temperature in terms of both economy and reliability compared to the giant MCE materials such as Gd - based intermetallic compounds or Heusler alloys. (C) 2015 Elsevier B.V. All rights reserved.
• Atomic Magnetic Moment and Exchange Interaction between Mn Atoms in Intermetallic Compounds in Mn-Ge System
  作者：Nobuyoshi Yamada

  DOI：10.1143/jpsj.59.273

  日期：1990.1
• Magnetic Structure of Intermetallic Compound κ-Mn₅Ge₂
  作者：Nobuyoshi Yamada、Satoru Funahashi、Fujio Izumi、Mineaki Ikegame、Tetuo Ohoyama

  DOI：10.1143/jpsj.56.4107

  日期：1987.11.15
• Ohba, T.; Ueyama, K.; Kitano, Y., Acta Crystallographica, Section C: Crystal Structure Communications, 1984, vol. 40, p. 576 - 579
  作者：Ohba, T.、Ueyama, K.、Kitano, Y.、Komura, Y.

  DOI：——

  日期：——