yttrium germanide | 12065-51-9

• 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: yttrium germanide
• 英文别名: Germane--yttrium (4/5)；germane;yttrium
• CAS: 12065-51-9
• 化学式: Ge₄Y₅
• 分子量: 734.889
• InChiKey: CUYQOWGTCWGRNG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -5.82
• 重原子数：
  9
• 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：

  锗烷 、 氢化钇 以 melt 为溶剂， 生成 yttrium germanide
  参考文献：
  名称：

  Y5Si4-Y5Ge4伪二元体系合金的相关系和低温热容

  摘要：

  摘要 利用 X 射线粉末衍射法研究了 10 Y 5 Si x Ge 4− x 合金的相组成和晶体结构，其中 x 从 0 到 4 变化，并测量了它们在恒压下的热容量从 ∼4 到350 K 使用半绝热量热法。硅化物Y 5 Si 4 属于Gd 5 Si 2 Ge 2 型晶体结构；锗化物Y 5 Ge 4 属于Sm 5 Ge 4 型晶体结构。Y 5 Si x Ge 4− x 体系中存在两种固溶体：x 在 4 到 3.5 之间变化的合金具有单斜 Gd 5 Si 2 Ge 2 型结构，x 在 3.0 到 0 之间变化的合金具有斜方晶 Sm 5 Ge 4 型晶体结构。低温热容量数据表明在室温以下不存在结构转变。

  DOI：

  10.1016/j.jallcom.2004.03.069

文献信息

• Gd_5−<i>x</i>Y_<i>x</i><i>Tt</i>₄ (<i>Tt</i> = Si or Ge): Effect of Metal Substitution on Structure, Bonding, and Magnetism
  作者：Sumohan Misra、Gordon J. Miller

  DOI：10.1021/ja802848r

  日期：2008.10.22

  A crystallographic study and theoretical assessment of the Gd/Y site preferences in the Gd(5-x)Y(x)Tt(4) (Tt = Si, Ge) series prepared by high-temperature methods is presented. All structures for the (Tt = Si, Ge) series prepared by high-temperature methods is presented. All structures for the system (Tt = Si, Ge) series prepared by high-temperature methods is presented. All structures for the Gd5-xYxSi4 system belong to the orthorhombic, Gd5Si4-type (space group Pnma). For the Gd5-xYxGe4 system, phases with x < 3.6 and x >= 4.4 adopt the orthorhombic, Sm5Ge4-type structure. For the composition range of 3.6 <= x <= 4.2, a monoclinic, U2Mo3Si4-type structure (space group P2(1)/c) occurs as the majority phase. This structure type has not been previously observed in the RE5T4 (T = Si, Ge, Ga) system and differs from the known monoclinic structure of Gd5Si2Ge2-type (space group P2(1)/a) because all Ge center dot center dot center dot Ge contacts between slabs are equivalent. The structural relationships between the Sm5Ge4-type and the U2Mo3Si4-type structures are discussed. Single crystal refinements of the occupancies for the three sites for Gd/Y atoms in the asymmetric unit reveal a partially ordered arrangement of Gd and Y atoms. TB-LMTO-ASA calculations were performed to study these atomic distributions as well as to elucidate possible electronic forces that might drive the structural variation. These results illustrate the importance of one of the Gd/Y-sites in shaping the magnetic and structural features observed in Gd(5-x)Y(x)Tt(4) system. The magnetic properties of some of the Gd(5-x)Y(x)Tt(4) phases are also reported. Germanides with x <= 2 show a metamagnetic-type transition similar to Gd5Ge4 from 57-92(2) K. As the Y concentration increases (3 <= x <= 4), these phases exhibit at least ferrimagnetic ordering with transition temperatures ranging from 15-31(2) K to the paramagnetic state.