Gadolinium-Germanium | 88344-16-5

• 英文名称: Gadolinium-Germanium
• 英文别名: Gadolinium--germane (1/1)；gadolinium;germane
• CAS: 88344-16-5
• 化学式: GdGe
• 分子量: 229.84
• InChiKey: GRJXHTGLKBDZCR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.45
• 重原子数：
  2
• 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：

  gadolinium pentagermanide 以 neat (no solvent) 为溶剂， 生成 锗烷 、 Gadolinium-Germanium
  参考文献：
  名称：

  稀土金属五锗化物 REGe5（RE = La、Nd、Sm、Gd）的热、磁、电子和超导特性以及 TbGe5 的合成 

  摘要：

  通过高压合成制备了包括新化合物TbGe5在内的一系列同型稀土金属五锗化物。它们在正交空间群 Immm 中结晶 [No. 71; a = 395.70(9) 下午；对于 TbGe5，b = 611.1(2) pm，c = 983.6(3) pm]。晶体结构与 LaGe5 同型，由褶皱的锗板组成，其中夹着第二种锗物种和稀土金属原子。在环境压力下，REGe5 相（RE = La、Nd、Sm、Gd 和 Tb）的热分解通过离散的中间步骤进入 Ge(cF8) 和热力学稳定的贫锗相。研究的化合物 REGe5 是顺磁性金属导体，在低温下呈反铁磁性排列。比热测量表明，LaGe5 的超导状态低于 Tc = 7。1(1) K 的特点是临界场 μ0Hc2 = 0.2 T 和弱电子-声子耦合。基于密度泛函的能带结构计算为所有同型 REGe5 化合物产生非常相似的电子结构。除了较小 RE 原子的价带宽度略有增加外，两种不同的锗环境仅发现微小差异。

  DOI：

  10.1002/zaac.201000065

文献信息

• Phase equilibria in the Gd-Ge-Sb system at 773 K and the magnetic properties of novel compound Gd8Ge13.29Sb1.72
  作者：Hongrui Liu、Changzhong Liao、Weijing Zeng、Tonghan Yang、Lingmin Zeng、Wei He

  DOI：10.1016/j.jallcom.2020.153841

  日期：2020.6

  Abstract The isothermal section of the phase diagram of the Gd-Ge-Sb ternary system at 773 K has been studied by X-ray powder diffraction (XRPD and S-PXRD), Rietveld method, scanning electron microscopy (SEM) equipped with energy dispersive (EDS), electron probe microanalysis (EPMA) and electron diffraction (ED). The existence of nine binary compounds, Gd5Ge3, Gd5Ge4, GdGe, Gd2Ge3, Gd3Ge5, Gd5Sb3,

  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 -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
• Magnetic Properties of the Pseudobinary Solid Solution GdGa1-xGex (0 ≤ x ≤ 1)
  作者：A. Leithe-Jasper、K. Hiebl

  DOI：10.1002/pssa.2211550122

  日期：1996.5.16

  A solid solution of tile binary phases GdGa and GdGe was found investigating the phase equilibria in the pseudobinary system GdGa1-xGex (0 less than or equal to x less than or equal to 1) at T = 800 degrees C X-ray powder diffraction patterns terns proved a C-orthorhombic unit cell (CrB-type). The results of the magnetic measurements reveal: a) GdGa is a simple ferromagnet, b) samples for 0 < x < 0.5 show a metamagnetic behavior, c) the alloys x greater than or equal to 0.5 and GdGe are antiferromagnets. Applying the RKKY theory to tile GdGa1-xGex system infers that the magnetic properties strongly depend on the conduction electron density at the Fermi level. Measurements of the electrical resistivity qualitatively support this assumption.
• 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.
• Structure and Properties of Gd₃Ge₄:  The Orthorhombic RE₃Ge₄ Structures Revisited (RE = Y, Tb−Tm)
  作者：Paul H. Tobash、Gary DiFilippo、Svilen Bobev、Namjung Hur、Joe D. Thompson、John L. Sarrao

  DOI：10.1021/ic7009034

  日期：2007.10.1

  The new binary compound Gd3Ge4 has been synthesized and its structure has been determined from single-crystal X-ray diffraction. Gd3Ge4 crystallizes in the orthorhombic space group Cmcm (No. 63) with unit cell parameters a = 4.0953(11) angstrom, b = 10.735(3) angstrom, c = 14.335(4) angstrom, and Z = 4. Its structure can be described as corrugated layers of germanium atoms with gadolinium atoms enclosed between them. The bonding arrangement in Gd3Ge4 can also be derived from that of the known compound GdGe (CrB type) through cleavage of the (1)(infinity)[Ge-2] zigzag chains in GdGe and a subsequent insertion of an extra germanium atom between the resulting triangular fragments. Formally, these characteristics represent isotypism with the Er3Ge4 type (Pearson's oC28). However, re-examination of the crystallography in the whole RE3Ge4 series (RE = Y, Tb-Tm) revealed discrepancies and called into question the accuracy of the originally determined structures. This necessitated a new rationalization of the bonding, which is provided in the context of a comparative discussion concerning both the original and revised structure models, along with an analysis of the trends across the series. The temperature dependence of the magnetic susceptibility of Gd3Ge4 shows that it is paramagnetic at room temperature and undergoes antiferromagnetic ordering below 29 K. Magnetization, resistivity, and calorimetry data for several other members of the RE3Ge4 family are presented as well.