Germane--holmium (3/5) | 12025-65-9

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物
• 英文名称: Germane--holmium (3/5)
• 英文别名: germane;holmium
• CAS: 12025-65-9
• 化学式: Ge₃Ho₅
• 分子量: 1042.42
• InChiKey: SWNAXGNRYDDAKZ-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：

  氢化钬 、 锗烷 以 melt 为溶剂， 反应 240.0h， 生成 Germane--holmium (3/5)
  参考文献：
  名称：

  Ho-Ni-Ge系统：等温截面和新的稀土镍锗化物

  摘要：

  通过X射线衍射和微探针分析研究了Ho-Ni-Ge系统在1070 K和高达60 at％Ho的情况下的情况。除了八种已知化合物外，HoNi 5 Ge 3（YNi 5 Si 3型），HoNi 2 Ge 2（CeAl 2 Ga 2型），Ho 2 NiGe 6（Ce 2 CuGe 6型），HoNiGe 3（SmNiGe 3）型），HoNi 0.2÷0.6 Ge 2（CeNiSi 2型），Ho 37÷34 Ni 6÷24 Ge 57÷42（AlB 2型），HoNiGe（TiNiSi型），Ho 3 NiGe 2（La 3 NiGe 2型），三元体系包含四个新化合物：Ho 3 Ni 11 Ge 4（Sc 3 Ni 11 Ge 4型），HoNi 3 Ge 2（ErNi 3 Ge 2型），Ho 3 Ni 2 Ge 3（Hf 3 Ni 2 Si 3型）和〜Ho 5 Ni 2 Ge 3（结构未知）。Ho 2 Ni

  DOI：

  10.1016/j.jssc.2014.12.025

文献信息

• The magnetic ordering in the Ho5Si3 and Ho5Ge3 compounds
  作者：A.V. Morozkin、O. Isnard、P. Henry、P. Manfrinetti

  DOI：10.1016/j.jallcom.2007.10.071

  日期：2008.9

  A neutron diffraction investigation has been performed on the Ho5Si3 and Ho5Ge3 compounds (hexagonal Mn5Si3-type, hP16, P6(3)/mcm) to study their magnetic structure. The results prove that these intermetallic phases show a complex sine-modulated type magnetic ordering, both presenting on cooling two subsequent antiferromagnetic (T-N1 and T-N2).Between T-N1 = 24(2) and T-N2 = 16(4) K Ho5Si3 shows a first antiferromagnetic ordering of the sine-modulated type with a propagation vector K-1 = [0,0+/-0.284(1)]: then, below T-N2 the sine-modulated type ordering is conserved. but by the two propagation vectors K-1 = [0,0+/-0.2773(7)] and K-2=[+/-1/5,+/-1/5,0].For Ho5Ge3, between T-N1 = 27(2) and T-N2 = 18(4) K, the sine-modulated ordering is realized through the propagation vectors K-1 = [0,0+/-3/10] and K-2=[0, 1/2, 0], whilst below T-N2 the ordering takes place with propagation vectors K-1 = [0,0+/-3/10], K-2=[0, 0 +/- 2/5] and K-4 = [+/-1/5, +/-1/5, 0]. For both Ho5Si3 and Ho5Ge3 compounds, the dimensions of the magnetic unit cell are 5a x 5a x 10c times the crystal unit cell of Mn5Si3-type. (C) 2007 Elsevier B.V. All rights reserved.
• Not Just Par for the Course: 73 Quaternary Germanides <i>RE</i>₄<i>M</i>₂<i>X</i>Ge₄ (<i>RE</i> = La–Nd, Sm, Gd–Tm, Lu; <i>M</i> = Mn–Ni; <i>X</i> = Ag, Cd) and the Search for Intermetallics with Low Thermal Conductivity
  作者：Dong Zhang、Anton O. Oliynyk、Gabriel M. Duarte、Abishek K. Iyer、Leila Ghadbeigi、Steven K. Kauwe、Taylor D. Sparks、Arthur Mar

  DOI：10.1021/acs.inorgchem.8b02279

  日期：2018.11.19

  total of 73 new quaternary rare-earth germanides RE4M2XGe4 (RE = rare-earth metal; M = Mn-Ni; X = Ag, Cd) were prepared through reactions of the elements. The solid solution Nd4Mn2Cd(Ge1-ySiy)(4) was also prepared under the same conditions and found to be complete over the entire range. All of these compounds adopt the monoclinic Ho4Ni2InGe4-type structure (space group C2/m, a = 14.2-16.7 angstrom, b = 4.0-4.6 angstrom, c = 6.8-7.5 angstrom, beta = 106-109 degrees), as revealed by powder X-ray diffraction analysis and single-crystal X-ray diffraction analysis on selected members. The structure determination of Nd-4(Mn0.78(1)Ag0.22(1))(2)Ag0.83(1)Ge4 disclosed disorder of Mn and Ag atoms within the tetrahedral site and Ag deficiencies within the square planar site. Within the solid solution Nd4Mn2Cd(Ge1-ySiy)(4), the end-members and two intermediate members were structurally characterized; as the Si content increases, the Cd sites become less deficient and the individual [Mn(2)Tt(2)] layers contract but become further apart from each other. Electronic band structure calculations confirm that the Ag-Ge or Cd-Ge bonds are the weakest in the structure and thus prone to distortion. Thermal property measurements confirm expectations from machine-learning predictions that these quaternary germanides should exhibit low thermal conductivity, which was found to be <10 W m(-1) for Nd4Mn2AgGe4.