samarium digermanide | 12025-61-5

• 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: samarium digermanide
• 英文别名: Germane--samarium (2/1)；germane;samarium
• CAS: 12025-61-5
• 化学式: Ge₂Sm
• 分子量: 295.54
• InChiKey: RPQXBFZBJYBQAA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -2.9
• 重原子数：
  3
• 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：

  锗烷 、 samarium digermanide 以 neat (no solvent) 为溶剂， 生成 samarium pentagermanide
  参考文献：
  名称：

  High-pressure synthesis and structures of lanthanide germanides of LnGe5 (Ln=Ce, Pr, Nd, and Sm) isotypic with LaGe5

  摘要：

  A series of lanthanide penta-germanides LnGe(5) (Ln = Ce, Pr, Nd and Sm) has been prepared by high-pressure (5-13 GPa) and high-temperature (500-1200 degrees C) reaction. CeGe5 crystallizes in an orthorhombic unit cell (S.G. Immm (71)) with a = 4.000(5)angstrom, b = 6.192(5)angstrom, c = 9.86(1)angstrom, and V = 244.1(5) angstrom(3). The new germanides are isotypic with LaGe5 Consisting of a Ge covalent network with tunnels where guest ions Ln(3+) are situated. The network is composed of sublayers; with edge-sharing Ge six-membered rings with only boat conformation. The sublayers are connected by rare eight-coordinated Ge atoms. The cell volume of the compounds systematically decreases from La to Sm compounds, except for CeGe5. owing to the lanthanide contraction. The lattice constants of CeGe5 are smaller than those of the Pr compound because it contains Ce4+ ions. CeGe5 is paramagnetic above 2 K. but does not obey the Curie-Weiss law. PrGe5 and NdGe5 are Curie-Weiss type paramagnets with Weiss temperatures of -3.3 and -18.4 K. SmGe5 shows an antiferromagnetic transition at 10.4 K. (C) 2009 Elsevier Inc. All rights reserved.

  DOI：

  10.1016/j.jssc.2009.05.018
• 作为产物：
  描述：

  锗烷 、 三氢化钐 以 melt 为溶剂， 生成 samarium digermanide
  参考文献：
  名称：

  High-pressure synthesis and structures of lanthanide germanides of LnGe5 (Ln=Ce, Pr, Nd, and Sm) isotypic with LaGe5

  摘要：

  A series of lanthanide penta-germanides LnGe(5) (Ln = Ce, Pr, Nd and Sm) has been prepared by high-pressure (5-13 GPa) and high-temperature (500-1200 degrees C) reaction. CeGe5 crystallizes in an orthorhombic unit cell (S.G. Immm (71)) with a = 4.000(5)angstrom, b = 6.192(5)angstrom, c = 9.86(1)angstrom, and V = 244.1(5) angstrom(3). The new germanides are isotypic with LaGe5 Consisting of a Ge covalent network with tunnels where guest ions Ln(3+) are situated. The network is composed of sublayers; with edge-sharing Ge six-membered rings with only boat conformation. The sublayers are connected by rare eight-coordinated Ge atoms. The cell volume of the compounds systematically decreases from La to Sm compounds, except for CeGe5. owing to the lanthanide contraction. The lattice constants of CeGe5 are smaller than those of the Pr compound because it contains Ce4+ ions. CeGe5 is paramagnetic above 2 K. but does not obey the Curie-Weiss law. PrGe5 and NdGe5 are Curie-Weiss type paramagnets with Weiss temperatures of -3.3 and -18.4 K. SmGe5 shows an antiferromagnetic transition at 10.4 K. (C) 2009 Elsevier Inc. All rights reserved.

  DOI：

  10.1016/j.jssc.2009.05.018

文献信息

• Investigation of the interactions of the components in the Sm–Pd–Ge system
  作者：J.M. Kurenbaeva、Yu.D. Seropegin、O.I. Bodak、V.N. Nikiforov

  DOI：10.1016/s0925-8388(98)00248-5

  日期：1998.5

  A variety of physicochemical analysis techniques have been employed in constructing the isothermal section of the phase diagram of the Sm-Pd-Ge system at 870 K. Several new ternary compounds have been found: Sm3Pd20-18.5Ge6-7.5, SmPd2.50-1.75Ge1.50-2.25, Sm2Pd3Ge5, Sm2PdGe6, SmPd3Ge, SmPd2Ge, SmPdCe2, SmPdGe, SmPd0.8-0.5 Ge1.2-1.5 and Sm2PdGe. The temperature dependencies of the specific resistance were investigated for Sm20Pd35Ge45, Sm20Pd40Ge40, Sm20Pd45Ge35, and Sm3Pd20Ge6. (C) 1998 Elsevier Science S.A.