Aluminium--uranium (4/1) | 12005-05-9

• 英文名称: Aluminium--uranium (4/1)
• 英文别名: alumane;uranium
• CAS: 12005-05-9
• 化学式: Al₄U
• 分子量: 345.955
• InChiKey: RQYVNTQDTAFZJZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -4.74
• 重原子数：
  5
• 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：

  铀 、 氢化铝 以 neat (no solvent) 为溶剂， 生成 Aluminium--uranium (4/1)
  参考文献：
  名称：

  Magnetic study of the U1−xLaxAl4 system

  摘要：

  The magnetic properties of the U1-xLaxAl4 system were investigated in the 4-600 K temperature range and fields up to 7 T. The UAl4 compound shows a magnetic behaviour typical for a spin fluctuations system. The U1-xLaxAl4 systems present Curie-Weiss type behaviour for x less than or equal to 0.6 and above a certain temperature T*. The negative paramagnetic Curie temperatures and the effective magnetic moment values indicate the presence of spin fluctuations. For x greater than or equal to 0.8 a temperature-independent susceptibility is observed. As the lanthanum content increases from x=0 to 0.6 the effective magnetic moment per uranium atom remains constant. (C) 2000 Elsevier Science S.A. All rights reserved.

  DOI：

  10.1016/s0925-8388(99)00646-5

文献信息

• The U-Nb-Al ternary system: experimental and simulated investigations of the phase equilibria and study of the crystal structure and electronic properties of the intermediate phases
  作者：Chantal Moussa、Alexandre Berche、Mathieu Pasturel、José Barbosa、Bertrand Stepnik、Sylvie Dubois、Olivier Tougait

  DOI：10.1016/j.jallcom.2016.08.257

  日期：2017.1

  Abstract The phase relations in the ternary U-Nb-Al system were established for the whole concentration range for 900 K and 1200 K. They were derived from quenched samples annealed at 900 K for three months and at 1200 K for two months by using x-ray powder diffraction, scanning electron microscopy and energy dispersive spectroscopic analyses. The formation of the two ternary phases, UNb 2 Al 20 and

  摘要 在 900 K 和 1200 K 的整个浓度范围内建立了三元 U-Nb-Al 体系中的相关系。它们来自于在 900 K 下退火三个月和在 1200 K 下退火两个月的淬火样品，使用 x射线粉末衍射、扫描电子显微镜和能量色散光谱分析。确认了两个三元相UNb 2 Al 20 和U 6 Nb 4 Al 43 的形成。两相均通过包晶反应形成，UNb 2 Al 20 和 U 6 Nb 4 Al 43 分别在 1200(5) K 和 1262(5) K 下形成。单晶结构细化证实UNb 2 Al 20 采用CeCr 2 Al 20 型（立方，F d 3 ¯ m ），U 6 Nb 4 Al 43 与Ho 6 Mo 4 Al 43 型（六方，P 6 3 / 厘米）。等温截面的特征在于 (i) 由于 U 和 Nb 之间以及 Nb 和 Al 之间在 bcc 相（γU 和 Nb）中的相互交换，在 1200 K
• High pressure studies of a new ternary actinide compound, UV2Al20
  作者：I. Halevy、E. Sterer、M. Aizenshtein、G. Kimmel、D. Regev、E. Yahel、L.C.J. Pereira、A.P. Goncalves

  DOI：10.1016/s0925-8388(01)00881-7

  日期：2001.4

  Abstract A new uranium compound, UV2Al20, is reported. This CeCr2Al20-type structure compound (a=14.4775(5) A) exhibits a large interatomic U-U distance, du-u=6.34 A, well beyond the Hill limit. The morphology of this sample was examined by means of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The susceptibility obeys the Curie–Weiss law in the temperature range of 80–300

  摘要 报道了一种新的铀化合物 UV2Al20。这种 CeCr2Al20 型结构化合物 (a=14.4775(5) A) 表现出很大的原子间 UU 距离，du-u=6.34 A，远远超出了希尔极限。通过扫描电子显微镜 (SEM) 和能量色散光谱 (EDS) 检查该样品的形态。磁化率在 80-300 K 的温度范围内遵循居里-魏斯定律，μeff=2.3(3)μB/fu。在低至 1.7 K 时未检测到磁转变，电阻率测量结果支持这一点。X 射线分析确定在 31.5 GPa 下 V/V0=0.82，没有结晶相变。体积模量和压力导数分别推导出为 B0=40(5) GPa 和 B0'=17(2)。
• Magnetic and Electrical Properties in NpAl₄ and UAl₄
  作者：Dai Aoki、Yoshinori Haga、Yoshiya Homma、Yoshinobu Shiokawa、Etsuji Yamamoto、Akio Nakamura、Rikio Settai、Yoshichika Ōnuki

  DOI：10.1143/jpsj.78.044712

  日期：2009.4.15

  We grew high-quality single crystals of NpAl4. together with UAl4, by the Al-flux method and measured the electrical resistivity. specific heat, magnetic susceptibility, magnetization and de Haas-van Alphen (dHvA) effect. NpAl4 is an antiferromagnet with the Neel temperature T-N = 49 K. The corresponding magnetic moment is most likely directed along the [010] direction in the orthorhornbic crystal structure. The large magnetic entropy at T-N and the Curie-Weiss behavior suggest the localized nature of 5f-electrons with the 5f(4) configuration. The detected dHvA frequencies in NpAl4 are small, indicating that the small magnetic Brillouin zone is formed in the antiferromagnetic state. On the other hand, the large Fermi surfaces are observed in a paramagnet UAl4. The detected cyclotron mass is relatively large, ranging from 3.4 to 23 m(0), which is consistent with the electronic specific heat coefficient gamma = 89 mJ/(K-2.mol).