Cerium--gallium (1/2) | 12157-58-3

• 英文名称: Cerium--gallium (1/2)
• 英文别名: cerium;gallane
• CAS: 12157-58-3
• 化学式: CeGa₂
• 分子量: 279.566
• InChiKey: QOIPMCSSQTWJHJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -2.37
• 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：

  Cerium--gallium (1/2) 、 cerium digermanide 以0%的产率得到
  参考文献：
  名称：

  Magnetic properties of CeGe2−xGax alloys

  摘要：

  CeGeGa, which has the alpha-ThSi(2) type structure, has been reported to be a dense Kondo ferromagnet with a Curie temperature of 5.5 K. In the present work we have studied the effect of varying Ge/Ga concentration on the magnetic behavior of Ce ions in the alloy system CeGe(2-x)Ga(x). We find that isostructural alloys are formed for 0.7 less than or equal to x less than or equal to 1.3. The off-stoichiometric alloys also order magnetically. Magnetisation data show that CeGe(1.3)Ga(0.7) is ferromagnetic like CeGeGa but CeGe(0.7)Ga(1.3) orders anti-ferromagnetically. A fairly large temperature independent CIT exceeding 50 mJ/(mol K(2)) in the paramagnetic region is observed in the off-stoichiometric alloys indicating the presence of Kondo interaction as in CeGeGa.

  DOI：

  10.1016/0921-4526(96)00122-6
• 作为产物：
  描述：

  氢化镓 、 氢化铈 (CeH3) 以 melt 为溶剂， 生成 Cerium--gallium (1/2)
  参考文献：
  名称：

  Standard enthalpies of formation of cerium gallides by high temperature reaction calorimetry

  摘要：

  The standard enthalpies of formation (Delta H-f(298.15)0) of Ce3Ga2, CeGa, CeGa2 and CeGa6 at 298.15 were determined by high temperature liquid gallium solution calorimetry to be -(71.1+/-2.7), -(84.1+/-1.9), -(51.5+/-1.4) and -(48.2+/-3.7) kT gatom(-1) respectively. The enthalpies of formation of Ce0.21Ga0.79 at 1125 K and CeGa6 at 876 K were determined by using precipitation calorimetry to be -(36.7+/-2.9) and -(52.8+/-3.0) kT gatom(-1). The partial enthalpies of solution of cerium in liquid gallium at infinite dilution (Delta(H) over bar (infinity)(Ce)) at 874 K and 1094 K were determined to be -(186.4+/-5.4) and -(213.0+/-3.7) kT gatom(-1) respectively. (C) 2001 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0925-8388(00)01494-8

文献信息

• Structural and magnetic properties of CeSi2−xGax alloys (x=1.5, 1.75 and 2.0)
  作者：S.K. Dhar、S.M. Pattalwar、R. Vijayaraghavan

  DOI：10.1016/0038-1098(93)90787-n

  日期：1993.8

  The crystal structure and the magnetic properties of the alloys CeSi2-xGax, x = 1.5, 1.75 and 2.0 have been investigated. The pseudoternary alloys are single phase crystallising in the AlB2 type structure of the parent compound CeGa2. The replacement: of Ga by Si weakens the magnetic interactions leading to lower magnetic ordering temperatures.
• The cerium-gallium system
  作者：D Dayan、J Pelleg、R Guisser

  DOI：10.1016/0022-5088(79)90057-2

  日期：1979.12
• Multiple Phase Transitions of Single Crystalline CeGa₂
  作者：Masahiko Takahashi、Hideyuki Tanaka、Takeo Satoh、Masahumi Kohgi、Yoshikazu Ishikawa、Tsuneo Miura、Humihiko Takei

  DOI：10.1143/jpsj.57.1377

  日期：1988.4.15
• Competition of the RKKY interaction with the Kondo effect in Y1−Ce Ga2
  作者：H. Sato、H. Henmi、Y. Aoki

  DOI：10.1016/0921-4526(94)00431-t

  日期：1995.2

  We have investigated the transport and magnetic properties in Y1-xCexGa2. In order to separate the effect of hybridization from the simple dilution effect, the experiment was also made on La1-xCexGa2 where the unit cell volume expands compared with CeGa2. For dilute Ce, Y1-xCexGa2 exhibits a clear Kondo-like behavior in electrical resistivity, thermoelectric power and specific heat.
• Effect of Li and Mg substitution on the crystal structure and magnetism of the REGa2 (RE=Ce and Eu) and EuGa4 compounds
  作者：Abishek K. Iyer、Lahari Balisetty、Sumanta Sarkar、Sebastian C. Peter

  DOI：10.1016/j.jallcom.2013.08.035

  日期：2014.1

  The compounds CeGa2, Ce0.82Mg0.50Ga1.68, Eu(Mg/Li)(x)Ga2-x (0 <= x <= 0.4) and Eu(Mg/Li)(x)Ga4-x(0 <= x <= 0.73) were synthesized and characterized by X-ray diffraction. CeGa2 and Ce0.82Mg0.50Ga1.68 crystallize in the AlB2 structure type with P6/mmm space group. The structure is composed of infinite arrays of planar hexagonal Ga atoms stacked along the [001] direction and the Ce atoms are sandwiched between them. Eu(Mg/Li)(x)Ga2-x (0 <= x <= 0.4) crystallize in the KHg2 structure type with Imma space group and consists of the hexagonal rings of M (Li/Mg + Ga) atoms connected along the [100] plane forming a puckered network with voids occupied by two Eu atoms. The Eu(Mg/Li)(x)Ga4-x (0 <= x <= 0.73) compounds crystallize in the BaAl4 structure type having I4/mmm space group. In Eu(Mg/Li)(x)Ga4-x, the Eu atom occupies the edge and the body centered position of the unit cell while the Ga and M (Li/Mg + Ga) atoms forms a 3D polyanionic framework. Magnetic susceptibility of CeGa2, EuGa2, EuGa4 and their corresponding Li/Mg analogs are discussed. (C) 2013 Elsevier Ltd. All rights reserved.