gadolinium germanide | 12024-94-1

• 英文名称: gadolinium germanide
• 英文别名: Gadolinium--germane (5/3)；gadolinium;germane
• CAS: 12024-94-1
• 化学式: Gd₅Ge₃
• 分子量: 1004.02
• InChiKey: VFULVDFJXRTVMN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -4.35
• 重原子数：
  8
• 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：

  氢化钆 、 锗烷 以 neat (no solvent) 为溶剂， 生成 gadolinium germanide
  参考文献：
  名称：

  Gd-Ge-Sb 系统在 773 K 的相平衡和新型化合物 Gd8Ge13.29Sb1.72 的磁性能

  摘要：

  摘要 采用 X 射线粉末衍射（XRPD 和 S-PXRD）、Rietveld 法、配备能量色散的扫描电子显微镜 (SEM) 研究了 Gd-Ge-Sb 三元体系在 773 K 相图的等温截面。 (EDS)、电子探针微量分析 (EPMA) 和电子衍射 (ED)。存在九种二元化合物，Gd5Ge3、Gd5Ge4、GdGe、Gd2Ge3、Gd3Ge5、Gd5Sb3、Gd4Sb3、GdSb、Gd16Sb39和Mn5Si3型Gd5Ge3-0Sb0-3（空间群P63/m3、h3P16-3、h3P16-3）确认了 Gd4Ge2-0Sb1-3 型（空间群 I-43d，No. 220，cI28）准二元固溶体和三元 Gd6Ge4.3Sb11.7 型 Gd6Ge4.3Sb11.7（空间群 Immm，No. 71，oI46），而在这项工作中发现了新的 GdGe1.69Bi0.21 型 Gd8Ge13.29Sb1.72（空间群

  DOI：

  10.1016/j.jallcom.2020.153841

文献信息

• Magnetic properties of Gd5T3 intermetallic compounds (T=Si,Ge,Sn)
  作者：Fabio Canepa、Sergio Cirafici、Myrta Napoletano

  DOI：10.1016/s0925-8388(01)01802-3

  日期：2002.3

  Abstract We report on the magnetic properties of the compounds Gd 5 T 3 (T=Si,Ge,Sn), as obtained from DC magnetisation measurements in applied fields up to 90 kOe and in a temperature range between 3 and 300 K. The low temperature magnetisation data of the three phases indicate antiferromagnetic ordering; in the paramagnetic state, all the compounds follow the Curie Weiss law with positive paramagnetic

  摘要 我们报告了化合物 Gd 5 T 3 (T=Si,Ge,Sn) 的磁特性，这些特性是通过在高达 90 kOe 的外加场和 3 到 300 K 之间的温度范围内的直流磁化测量获得的。三相温度磁化数据表明反铁磁有序；在顺磁性状态下，所有化合物都遵循居里魏斯定律，具有正顺磁性居里温度。在 5 K 和 90 kOe 下，发现整个系列的磁矩降低，范围从 Gd 5 Si 3 的 4.1 μ B /Gd 原子到 Gd 5 Sn 3 的 2.44 μ B /Gd 原子。最后，对于具有 Si 和 Ge 的化合物，在 DC 磁化测量中观察到自旋随角跃迁，在 5 K 下，Gd 5 Si 3 的 H cr = 48 kOe，Gd 5 Ge 3 的 H cr =68 kOe。
• Calorimetric determination of standard molar enthalpies of formation of gadolinium silicides and germanides
  作者：N.I Usenko、M.I Ivanov、V.V Berezutski、R.I Polotska

  DOI：10.1016/s0925-8388(97)00480-5

  日期：1998.2

  The standard molar enthalpies of formation of gadolinium silicides and germanides have been determined by solution drop calorimetry. The following values of Delta H-f(0) (kJ g(-1)-atom) are reported: GdSi1.89, -58.3 +/- 4.3; GdSi1.5, -69.4 +/- 5.1; GdSi, -88.7 +/- 4.3; Gd5Si4, -75.7 +/- 4.6; Gd5Si3, -73.5 +/- 4.5; GdGe1.63, -65.0 +/- 4.1; GdGe1.5, -70.7 +/- 4.1; GdGe, -79.6 +/- 3.5; Gd5Ge4, -79.5 +/- 3.1; Gd5Ge3, -83.1 +/- 3.4. Our results are in satisfactory agreement with other calorimetric data. (C) 1998 Elsevier Science: S.A.
• The isothermal section of the Gd–Fe–Ge ternary system at 773K
  作者：Y.H. Zhuang、K.F. Li、C.H. Ma、X. Chen

  DOI：10.1016/j.jallcom.2007.12.027

  日期：2009.1

  The isothermal section of the phase diagram of the Gd-Fe-Ge ternary system at 773 K was investigated by X-ray powder diffraction (XRD), differential thermal analysis (DTA) and optical microscopy. The existences of 14 binary compounds, GdFe(2), GdFe(3), Gd(6)Fe(23), Gd(2)Fe(17), Fe(3)Ge, Fc(5)Ge(3), Fe(6)Ge(5), FeGe, FeGe(2), Gd(5)Ge(3),Gd(5)Ge(4), GdGe,Gd(2)Ge(3), Gd(3)Ge(5), and four ternary compounds GdFe(2)Ge(2), GdFe(6)Ge(6), Gd(2)FeGe(4), Gd(117)Fe(52)Ge(112), were confirmed. This section consists of 21 single-phase regions, 43 two-phase regions, and 23 three-phase regions. (C) 2007 Published by Elsevier B.V.
• Structural and magnetic properties of the Mn5Si3-type (Gd1−xScx)5Ge3 compounds
  作者：S.K Dhar、P Manfrinetti、A Palenzona、M Pani

  DOI：10.1016/s0925-8388(02)00750-8

  日期：2002.12

  The series of pseudo-binary compounds (Gd1-xScx)Ge-3, with x=0, 0.1, 0.3, 0.4, 0.52, 1, has been thoroughly studied by X-ray diffraction, both on powders and single crystals. All phases are isotypic, crystallizing with the Mn5Si3 structure type, and the occurrence of a complete solid solution has been shown. The two Mn sites of the hexagonal lattice, i.e. the 4d and 6g positions, are preferentially occupied by Sc and Gd atoms, respectively. Magnetisation measurements show that Sc5Ge3 is a Pauli paramagnet while Gd5Ge3 orders antiferromagnetically at 80 K. The magnetic behaviour is appreciably affected with the replacement of Gd by Sc and even for x=0.1 there is no distinct signature of antiferromagnetic transition. At higher x, spin glass-like ordering is indicated by broad peaks in the magnetisation around 20 K with no corresponding anomaly in the heat capacity data. (C) 2002 Elsevier Science B.V. All rights reserved.
• Low temperature irreversible field induced magnetic transition in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0005.gif" overflow="scroll"><mml:msub><mml:mrow><mml:mi>Gd</mml:mi></mml:mrow><mml:mrow><mml:mn>5</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Ge</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:math>
  作者：Pallavi Kushwaha、R. Rawat

  DOI：10.1016/j.ssc.2012.07.008

  日期：2012.10

  The origin of anomalous thermomagnetic irreversibility in rare earth germanide Gd5Ge3 has been addressed. Open hysteresis observed in magnetoresistance (MR) at low temperature is shown to decrease with increasing temperature which correlates with the corresponding isothermal magnetostriction (MS) measurements. These thermomagnetic irreversibilities are interpreted in terms of kinetic arrest of magnetic field induced first order transition. The minor loop study of isothermal MS suggests that open loop in MS and MR is associated with large magnetostriction across metamagnetic transitions. The magnetoresistance associated with the second metamagnetic transition at higher field is reversible where magnetostriction variation with field is negligible. (C) 2012 Elsevier Ltd. All rights reserved.