palladium-cerium | 12292-14-7

• 分子结构分类: 无机化合物 - 均相金属化合物 - 金属间镧系化合物
• 英文名称: palladium-cerium
• 英文别名: Cerium--palladium (1/1)；cerium;palladium
• CAS: 12292-14-7
• 化学式: CePd
• 分子量: 246.54
• InChiKey: FXWOKQCOEKNKIZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.0
• 重原子数：
  2
• 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：

  palladium-cerium 、 magnesium 生成
  参考文献：
  名称：

  Magnetic properties of new CeTMg compounds (T  Ni, Pd)

  摘要：

  We present results of the first investigation of ternary Ce-compounds containing a transition metal and Mg. The structure, resistivity and susceptibility of Ce2Ni2Mg, CeNi4Mg and CePdMg are reported and discussed. These compounds crystallise in the same structure as their respective In-homologues and show very similar structural parameters, but weaker strength of the Ce-4f-hybridization.

  DOI：

  10.1016/s0921-4526(97)00098-7
• 作为产物：
  描述：

  氢化铈 (CeH3) 、 钯 生成 palladium-cerium
  参考文献：
  名称：

  CePd 的低温热和高压研究

  摘要：

  将 Kondo 晶格的异常特性与性能良好的 Kondo 系统 CePd 进行比较。CePd 的低温热膨胀与之前的热容量数据一致，显示出铁磁转变和第二次转变可能是由于磁矩的重新定向。根据热膨胀和热容量计算的 Gruneisen 因子与根据压力相关性计算的 Gruneisen 因子相同，并且与之前的 测量值 相当。已在 1.6-40 K 的温度范围内进行了热膨胀测量（在高达 8 T 的场中）和交流磁化率测量（在高达 7.33 kbar 的压力下）。零压力交流磁化率测量证实存在反铁磁跃迁，如先前报道。在零磁场中对多晶线性热膨胀系数的磁性贡献在 17 K 附近具有最大值，并在 29 K 处变小。在尼尔温度处没有峰值。发现 Neel 温度在压力下以 的速率降低，这表明在多尼亚赫图的右侧是近藤磁性晶格（带有 ）。

  DOI：

  10.1088/0953-8984/10/42/014

文献信息

• Intermetallic Cerium Compounds with Ordered U₃Si₂ Type Structure
  作者：Rainer Pöttgen、Artur Fugmann、Rolf-Dieter Hoffmann、Ute Ch. Rodewald、Dirk Niepmann

  DOI：10.1515/znb-2000-0204

  日期：2000.2.1

  New intermetallic cerium compounds Ce₂T₂Mg (T = Ni, Cu, Pd), C₂T₂Cd (T=Pd, Pt, Au), and C₂T₂Pb (T = Pt, Au) were prepared by reaction of the elements in sealed tantalum tubes in a high-frequency furnace. Most C₂T₂X (X = Mg, Cd, Pb) compounds are stable after annealing at about 1000 K, while Ce₂Pd₂Mg is obtained as single phase only after melting and quenching. A thermal treatment at about 1000 K leads to decomposition in CePdMg and CePd. The eight compounds were investigated by X-ray diffraction both as powders and single crystals, and most structures were refined from single crystal data. They adopt an ordered U₃Si₂ type structure with space group P4/mbm: a = 759.6(1), c = 376.71 (9) pm, wR2 = 0.0562, 294 F² values, 12 parameters for Ce₂Ni₂Mg, a = 787.41(9), c = 387.23(7) pm, wR2 = 0.0438, 222 F² values, 12 parameters for Ce₂Cu₂Mg, a = 777.14(8), c = 400.03(7) pm, wR2 = 0.0276, 221 F² values, 13 parameters for Ce₂Pd_2.03Mg_0.97, a = 777.90(6), c = 393.28(6) pm, wR2 = 0.0360,317 F² values, 12 parameters for Ce₂Pd₂Cd, and a = 779.90(7), c = 389.97(7) pm, wR2 = 0.0453, 315 F² values, 12 parameters for Ce₂Pt₂Cd. Refinement of the occupancy parameters revealed full occupancy for most sites. A mixed palladium/magnesium (97 % Mg / 3 % Pd) occupancy was observed only for the 2a site of Ce₂Pd_2.03Mg_0.97, indicating a small homogeneity range for this compound. Ce₂Au₂Cd (a = 804.93(7), c =393.36(6) pm) and the plumbides Ce₂Pt₂Pb (a = 794.63(7), c = 381.50(6) pm) and Ce₂Au₂Pb (a = 810.70(7), c = 394.85(7) pm) were characterized through their Guinier powder data. The structures of the Ce₂T₂X compounds can be interpreted as an intergrowth of distorted AIB₂ and CsCl related slabs of compositions CeT₂ and CeX. The course of the lattice parameters and chemical bonding within the series of Ce₂T₂X compounds are briefly discussed.

  摘要 新型金属间铈化合物 Ce2T2Mg（T=Ni、Cu、Pd）、C2T2Cd（T=Pd、Pt、Au）和 C2T2Pb（T=Pt、Au）是通过在高频炉中密封钽管中的元素反应制备的。大多数 C2T2X（X = Mg、Cd、Pb）化合物在约 1000 K 退火后是稳定的，而 Ce2Pd2Mg 则只有在熔化和淬火后才能得到单相。约 1000 K 的热处理会导致 CePdMg 和 CePd 分解。对这八种化合物的粉末和单晶都进行了 X 射线衍射研究，大多数结构都是根据单晶数据提炼出来的。它们采用有序的 U3Si2 型结构，空间群为 P4/mbm：a = 759.6(1)，c = 376.71 (9) pm，wR2 = 0.0562，294 F2 值；Ce2Ni2Mg 有 12 个参数，a = 787.41(9)，c = 387.23(7) pm，wR2 = 0.0438，222 F2 值；Ce2Cu2Mg 有 12 个参数，a = 777.14(8), c = 400.03(7) pm, wR2 = 0.0276, 221 F2 值, 13 个参数为 Ce2Pd2.03Mg0.97, a = 777.90(6), c = 393.28(6) pm, wR2 = 0.0360，317 F2 值，Ce2Pd2Cd 的 12 个参数，以及 a = 779.90(7)，c = 389.97(7) pm，wR2 = 0.0453，315 F2 值，Ce2Pt2Cd 的 12 个参数。对占位参数的细化显示了大多数位点的完全占位。仅在 Ce2Pd2.03Mg0.97 的 2a 位点观察到钯/镁（97% 镁/3% 钯）混合占据，表明该化合物的均匀性范围较小。Ce2Au2Cd (a = 804.93(7), c = 393.36(6) pm) 和铅化物 Ce2Pt2Pb (a = 794.63(7), c = 381.50(6) pm) 和 Ce2Au2Pb (a = 810.70(7), c = 394.85(7) pm) 的特征是通过它们的吉尼尔粉末数据得到的。Ce2T2X 化合物的结构可解释为成分为 CeT2 和 CeX 的变形 AIB2 和氯化铯相关板坯的相互生长。本文简要讨论了 Ce2T2X 系列化合物的晶格参数和化学键的变化过程。
• Electronic structure of Ce and its intermetallic compounds
  作者：J. C. Fuggle、F. U. Hillebrecht、Z. Zołnierek、R. Lässer、Ch. Freiburg、O. Gunnarsson、K. Schönhammer

  DOI：10.1103/physrevb.27.7330

  日期：——
• Hydrogen absorbing characteristics of R–M (R=La, Ce; M=Co, Rh, Ir, Ni, Pd, Pt) binary systems
  作者：J. Kadono、K. Hirano、S. Nishiuchi、R. Ariga、S. Yamamoto、T. Tanabe、H. Miyake

  DOI：10.1016/j.jallcom.2005.04.073

  日期：2006.2

  The capacity, rate and reversibility of the hydrogen absorbing/desorbing reaction have been measured for the binary systems composed of rare earth metal, R (La or Ce), and transition metal, M (Co, Rh, Ir, Ni, Pd or Pt), by Sieverts' method. These experimental results were discussed by comparing with the theoretical ones; density of states, cohesive energy and energy fluctuation, which were calculated by the extended Huckel method. Major results obtained are as follows. (1) The capacity of hydrogen absorption decreases almost linearly with increasing M components in R-M systems and it is explained in terms of the density of states. (2) The rate of hydrogen-absorbing reaction in La-M systems are larger than that of Ce-M systems. The larger absorption rate corresponds to the larger energy fluctuation. (3) The reversibility of the hydrogen absorbing/desorbing reaction is closely related with the cohesive energy of these systems. When the cohesive energy of the hydrogen absorbed system is large, a reverse (i.e. desorbing) reaction hardly occurs. (c) 2005 Elsevier B.V. All rights reserved.
• <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>f</mml:mi></mml:math>-count effects in x-ray-absorption spectra of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>3</mml:mn><mml:mi>d</mml:mi></mml:math>levels in Ce and its intermetallic compounds
  作者：J. C. Fuggle、F. U. Hillebrecht、J.-M. Esteva、R. C. Karnatak、O. Gunnarsson、K. Schönhammer

  DOI：10.1103/physrevb.27.4637

  日期：——
• Isothermal cross-section of the Ce–Pd–Ge phase diagram at 600°C
  作者：Yu.D. Seropegin、A.V. Gribanov、O.I. Bodak

  DOI：10.1016/s0925-8388(98)00247-3

  日期：1998.5

  The interaction of the components in the Ce-Pd-Ge system at 600 degrees C was investigated over the whole concentration range by X-ray powder and monocrystal diffraction, metallography, and X-ray microprobe analysis. The formation of the previously reported phases, CePdGe and CePd2Ge2, was confirmed and 15 new ternary compounds were observed. The crystal structures of the compounds Ce2PdCe6, Ce(Pd,Ge)(2), Ce3Pd20Ge6, CePd2Ge, Ce7Pd4Ge2 and CePd5Ge3 were determined. (C) 1998 Elsevier Science S.A.