Aluminium--lanthanum (1/3) | 12042-36-3

• 英文名称: Aluminium--lanthanum (1/3)
• 英文别名: alumane;lanthanum
• CAS: 12042-36-3
• 化学式: AlLa₃
• 分子量: 443.698
• InChiKey: YRFBUURXQGPPEW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.18
• 重原子数：
  4
• 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：

  三氢化镧 、 氢化铝 以 melt 为溶剂， 生成 Aluminium--lanthanum (1/3)
  参考文献：
  名称：

  Phase equilibria in the ternary Al–Zr–La system

  摘要：

  The phase relationships in the Al-Zr-La ternary system at 773 K have been investigated for the first time mainly by means of X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive analysis (EDX). The existence of the Al4La5 and AlLa2 binary compounds has been confirmed in this ternary system. The isothermal section consists of 18 single-phase regions, 33 two-phase regions and 16 three-phase regions. No ternary compound was observed in this work. (C) 2010 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jallcom.2010.07.133

文献信息

• Preparation of single crystals of LaAl and X-ray structure determination
  作者：Andreas Leineweber、Herbert Jacobs

  DOI：10.1016/s0925-8388(98)00636-7

  日期：1998.8

  Single crystals of the compound LaAl have been prepared by the reaction of a mixture of lanthanum and aluminium under nitrogen at 950°C. Previously reported crystal structure data determined by X-ray powder diffraction are now confirmed by an X-ray single crystal structure analysis on LaAl: space group Cmcm, Z=8, a=9.455(1) A, b=7.753(1) A, c=5.791(1) A, R1/wR2=2.4/5.6, N(F2≥2σ(I2))=685, N(var.)=16

  镧和铝的混合物在氮气下在 950°C 下反应制备了化合物 LaAl 的单晶。先前报道的由 X 射线粉末衍射确定的晶体结构数据现在通过对 LaAl 的 X 射线单晶结构分析得到证实：空间群 Cmcm, Z=8, a=9.455(1) A, b=7.753(1) A , c=5.791(1) A, R1/wR2=2.4/5.6, N(F2≥2σ(I2))=685, N(var.)=16。LaAl 的结构包含由两个晶体学独立的 Al 原子形成的锯齿形链，Al-Al-Al 的交替角为 64° 和 180°。链通过镧原子连接。
• Effect of volume variation on the properties of the Kondo system<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">Al</mml:mi></mml:math>
  作者：A. N. Medina、M. A. Hayashi、L. P. Cardoso、S. Gama、F. G. Gandra

  DOI：10.1103/physrevb.57.5900

  日期：——

  We have measured the electrical resistivity and ac magnetic susceptibility (chi)(T) of (La1-xCex)(3)Al, for 0 less than or equal to x less than or equal to 1, and the electrical resistivity of (Ce1-zYz)(3)Al, for 0 less than or equal to z less than or equal to 0.1. The system was characterized using x-ray diffraction and metallography. From x-ray data we were able to determine the structure for all samples to be hexagonal and that the unit-cell volume decreases linearly in going from the La-rich side to the Ce-rich side. The results show that La3Al is a superconductor below 6.2 K a:nd that T-c decreases rapidly with the increase of the Ce concentration. For x > 0.04 we observed a minimum in the resistivity and a reduction of the effective magnetic moment of Ce due to a strong compensation promoted by the Kondo effect. Our results show that the Kondo temperature increases with Ce and Y concentration, according to the reduction of the unit-cell volume. We also show that the antiferromagnetic transition temperature goes through a maximum at z = 0.025, indicating that there is an interplay between superconductivity, antiferromagnetic ordering, and the Kondo effect. A diagram illustrating the evolution of the T-K and T-N is :presented. The electronic specific heat (gamma) increases with the Ce concentration showing a maximum around x approximate to 0.4. It was also possible to determine values for the rho J product and the relative variation of the exchange parameter.
• Structure, crystal fields, magnetic interactions, and heavy-fermion behavior in (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant="normal">−</mml:mi><mml:mi mathvariant="normal">x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Al
  作者：Y. Y. Chen、Y. D. Yao、B. C. Hu、C. H. Jang、J. M. Lawrence、H. Huang、W. H. Li

  DOI：10.1103/physrevb.55.5937

  日期：——

  We report measurements of the resistivity rho, susceptibility chi, and specific heat C of the alloys (Ce1-xLax)(3)Al. At room temperature these form in the hexagonal Ni3Sn structure (alpha-Ce3Al); at low temperatures a structural transition to a monoclinic phase occurs for 0 less than or equal to x less than or equal to 0.3 (gamma-Ce3Al); and a transition with a similar feature in the resistivity occurs for 0.75