Germane--scandium (3/5) | 60874-39-7

• 分子结构分类: 有机化合物 - 有机盐 - 有机金属盐
• 英文名称: Germane--scandium (3/5)
• 英文别名: germane;scandium
• CAS: 60874-39-7
• 化学式: Ge₃Sc₅
• 分子量: 442.55
• InChiKey: YSUIZEKQGPVBRH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -4.37
• 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

• 作为反应物：
  描述：

  镍 、 锗烷 、 Germane--scandium (3/5) 以 neat (no solvent) 为溶剂， 生成
  参考文献：
  名称：

  Standard enthalpies of formation of Me5Ge3(Me ≡ Sc, Y, La) by high-temperature calorimetry

  摘要：

  The standard enthalpies of formation of the germanides Me5Ge3(Me = Sc, Y, La) were determined by high-temperature calorimetry at 1473 +/- 2 K. The following values are reported: DELTA-H(f)o(Sc5Ge3) = - 747.3 +/- 30.8 kJ mol-1 and DELTA-H(f)o(Y5Ge3) = - 718.2 +/- 39.9 kJ mol-1, measured by solute-solvent drop calorimetry, and DELTA-H(f)o(La5Ge3) = - 543.9 +/- 8.0 kJ mol-1, measured by the direct synthesis method. The results are compared with estimated values from Miedema's semi-empirical model.

  DOI：

  10.1016/0022-5088(91)90237-x
• 作为产物：
  描述：

  氢化钪 、 锗烷 以 neat (no solvent) 为溶剂， 生成 Germane--scandium (3/5)
  参考文献：
  名称：

  Standard enthalpies of formation of Me5Ge3(Me ≡ Sc, Y, La) by high-temperature calorimetry

  摘要：

  The standard enthalpies of formation of the germanides Me5Ge3(Me = Sc, Y, La) were determined by high-temperature calorimetry at 1473 +/- 2 K. The following values are reported: DELTA-H(f)o(Sc5Ge3) = - 747.3 +/- 30.8 kJ mol-1 and DELTA-H(f)o(Y5Ge3) = - 718.2 +/- 39.9 kJ mol-1, measured by solute-solvent drop calorimetry, and DELTA-H(f)o(La5Ge3) = - 543.9 +/- 8.0 kJ mol-1, measured by the direct synthesis method. The results are compared with estimated values from Miedema's semi-empirical model.

  DOI：

  10.1016/0022-5088(91)90237-x

文献信息

• Enhancing Magnetic Functionality with Scandium: Breaking Stereotypes in the Design of Rare Earth Materials
  作者：Yaroslav Mudryk、Durga Paudyal、Jing Liu、Vitalij K. Pecharsky

  DOI：10.1021/acs.chemmater.7b00314

  日期：2017.5.9

  Based upon this counterintuitive experimental finding we demonstrate the unique role 3d1 electrons of scandium atoms play in mediating magnetic interactions between the gadolinium atoms from the neighboring layers in the Sm5Ge4-type crystal lattice. Scandium substitutions at and below 20% rapidly increase the Curie temperature, TC, of the Gd5Ge4 parent, eliminate both the kinetic arrest and hysteresis

  用弱磁性scan代替强磁性g意外地增强了（Gd 1– x Sc x）5 Ge 4中的铁磁相互作用。基于这个与直觉相反的实验发现，我们证明了d原子的3d 1电子在介导Sm 5 Ge 4型晶格中相邻层的the原子之间的磁性相互作用中发挥的独特作用。％替代率达到或低于20％会迅速提高Gd 5 Ge 4的居里温度T C。母体，消除了动力学停滞和磁滞现象，并大大提高了T C的一阶磁结构转变的可逆性。与第一性原理的预测一致，高于20％的Sc会导致形成密切相关的Pu 5 Rh 4一种类型的结构，其中一阶磁结构转换被常规的二阶铁磁有序替换，该二阶铁磁有序保持伴随着晶格的连续重排。两种具有相似结构和组成的材料的比较表明，在一阶材料中会产生明显更强的磁热效应，这也显示出非常小的磁滞现象。此外，我们证明了特定原子间距离的行为可以预测一系列合金的异常物理性能，其中晶格参数的成分依赖性表明固溶度相当小，并且磁化强度不高。
• 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.