Neodymium--nickel (1/2) | 12201-76-2

• 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: Neodymium--nickel (1/2)
• 英文别名: neodymium;nickel
• CAS: 12201-76-2
• 化学式: NdNi₂
• 分子量: 261.62
• InChiKey: ZPIYCWKUVQQKQI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 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：

  氟化钕 、 Neodymium--nickel (1/2) 在 LiF 、 CaF₂ 作用下， 以 melt 为溶剂， 生成 Neodymium--nickel (1/5)
  参考文献：
  名称：

  Nd-Ni合金在熔融LiF-CaF2-NdF3中的电化学形成

  摘要：

  The electrochemical formation of Nd-Ni alloys was investigated in a molten LiF-CaF2-NdF3 (0.30 mol %) system at 1123 K. Cyclic voltammetry and open-circuit potentiometry indicated the formation of several phases of Nd-Ni alloys. Potentiostatic electrolysis was conducted to prepare an alloy sample using a Ni plate electrode at 0.15 V vs. Li+/Li for 75 min. Cross-sectional scanning electron microscopy revealed that the entire Ni plate was transformed into Nd-Ni alloy. X-ray diffraction analysis confirmed that the alloy consisted predominantly of the NdNi2 phase with NdNi3 as the minor phase. When the electrolytic potential was changed to 0.35 V and 0.60 V after electrolysis at 0.15 V for 75 min, the resultant phases were NdNi3 and NdNi5, respectively. The formation potential for each Nd-Ni alloy phase was determined from the experimental results. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.072112jes] All rights reserved.

  DOI：

  10.1149/2.072112jes
• 作为产物：
  描述：

  镍 、 三氢化钕 以 melt 为溶剂， 生成 Neodymium--nickel (1/2)
  参考文献：
  名称：

  镁笼化合物RNi2Mg20(R=Pr和Nd)输运和磁性能的合成与研究

  摘要：

  我们已经合成了镁笼化合物R Ni 2 Mg 20 ( R  =  Pr 和 Nd)。我们报告了电阻率ρ、磁化率χ、等温磁化强度M和比热C 的测量值。通过退火获得R  = Pr 和 Nd 的多晶样品，而发现不存在R  = La、Ce 和 Y的对应物。R的ρ ( T ) 数据 = Pr 和 Nd 在从 300 K 冷却到 40 K 时单调减少，并分别在 13 K 和 15 K 附近出现肩峰。χ ( T ) 数据的居里-魏斯行为表明 Pr 和 Nd 离子的三价态。对于R  = Pr，C ( T ) 在 7 K 附近的最大值由双峰-三重态两能级模型再现，能隙为 14 K。C ( T ) 在 0.7 K 处的峰值归因于短路-非Kramers接地双峰中四极自由度的范围顺序。另一方面，对于R  = Nd，C ( T) 在 9 K 附近通过从基态双重态到相隔 23 K 的激发四重态的热激发来解释。进一步冷却后，C

  DOI：

  10.1016/j.jallcom.2021.162361

文献信息

• Synthesis and study of transport and magnetic properties of magnesium cage compounds RNi2Mg20 (R= Pr and Nd)
  作者：Yuka Kusanose、Takahiro Onimaru、Yu Yamane、Kazunori Umeo、Toshiro Takabatake

  DOI：10.1016/j.jallcom.2021.162361

  日期：2022.2

  synthesized magnesium cage compounds RNi2Mg20 (R = Pr and Nd). We report the measurements of electrical resistivity ρ, magnetic susceptibility χ, isothermal magnetization M, and specific heat C. Polycrystalline samples with R = Pr and Nd were obtained by annealing, while the counterparts for R = La, Ce, and Y were found to be absent. The ρ(T) data for R = Pr and Nd monotonically decrease on cooling from 300 K

  我们已经合成了镁笼化合物R Ni 2 Mg 20 ( R  =  Pr 和 Nd)。我们报告了电阻率ρ、磁化率χ、等温磁化强度M和比热C 的测量值。通过退火获得R  = Pr 和 Nd 的多晶样品，而发现不存在R  = La、Ce 和 Y的对应物。R的ρ ( T ) 数据 = Pr 和 Nd 在从 300 K 冷却到 40 K 时单调减少，并分别在 13 K 和 15 K 附近出现肩峰。χ ( T ) 数据的居里-魏斯行为表明 Pr 和 Nd 离子的三价态。对于R  = Pr，C ( T ) 在 7 K 附近的最大值由双峰-三重态两能级模型再现，能隙为 14 K。C ( T ) 在 0.7 K 处的峰值归因于短路-非Kramers接地双峰中四极自由度的范围顺序。另一方面，对于R  = Nd，C ( T) 在 9 K 附近通过从基态双重态到相隔 23 K 的激发四重态的热激发来解释。进一步冷却后，C
• Crystal field splitting observed in RNi2 compounds (R = Pr, Nd, Tb, Er, Ho, Tm) by means of inelastic neutron scattering
  作者：E.A. Goremychkin、I. Natkaniec、E. Mühle、O.D. Chistyakov

  DOI：10.1016/0304-8853(89)90229-1

  日期：1989.9
• Crystal field effects on polycrystalline (rare earth)Ni2 intermetallic compounds
  作者：M.R. Ibarra、J.I. Arnaudas、P.A. Algarabel、A. del Moral

  DOI：10.1016/0304-8853(84)90354-8

  日期：1984.12
• Hybridization and correlation effects in the photoemission spectra of<i>R</i><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>(<i>R</i>=Ce, Pr, and Nd)
  作者：J.-S. Kang、J. H. Hong、D. W. Hwang、J. I. Jeong、S. D. Choi、C. J. Yang、Y. P. Lee、C. G. Olson、Kicheon Kang、B. I. Min

  DOI：10.1103/physrevb.49.16248

  日期：——

  Electronic structures of RNi2 (R = Y, Ce, Pr, and Nd) are investigated systematically by using photoemission spectroscopy (PES) and compared with those of RCo2. Double-peak structures are observed in the R 4f PES spectra, in which the spectral weight near E(F) decreases from Ce to Pr and Nd, suggesting a decrease in the R 4f-Ni 3d hybridization from Ce to Pr and Nd. For the same R, the spectral weight near E(F) in RNi2 is smaller than that in RCO2, implying a smaller R 4f hybridization with Ni 3d electrons in RNi2 than with Co 3d electrons in RCo2. These trends are consistent with those in the calculated hybridization matrix elements for RM2 (M = Co and Ni). A pronounced Ni 3d satellite is observed, which arises from Ni 3d Coulomb correlation effects. The Ni 3d partial spectral weight distribution in RNi2 exhibits important discrepancies from the calculated Ni 3d angular momentum projected local density of states (PLDOS), such as peak positions and line shapes, indicating substantial Ni 3d correlation effects. These discrepancies are qualitatively similar to, and quantitatively larger than, those for RCo2. Quasiparticle spectral densities are calculated by using the Hubbard Hamiltonian and including Co and Ni 3d electron correlation effects, which yield a better agreement with PES spectra than the local-density approximation PLDOS's.
• Vacancy motion in rare-earth-deficient<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>R</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>Laves phases observed by perturbed angular correlation spectroscopy
  作者：M. Forker、P. de La Presa、S. Müller、A. Lindbaum、E. Gratz

  DOI：10.1103/physrevb.70.014302

  日期：——

  Rare-earth-deficient R1-xNi2 Laves phases, which reportedly crystallize in a C15 superstructure with ordered R vacancies, have been investigated by perturbed angular correlation (PAC) measurements of electric quadrupole interactions at the site of the probe nucleus Cd-111. Although Cd-111 resides on the cubic R site, a strong axially symmetric quadrupole interaction (QI) with frequencies nu(q)approximate to265-275 MHz has been found in the paramagnetic phases of R1-xNi2 with R=Pr,Nd,Sm,Gd. This interaction is not observed for the heavy R constituents R=Tb,Dy,Ho,Er. The fraction of probe nuclei subject to the QI in R1-xNi2, R=Pr,Nd,Sm,Gd, decreases from 100% at low temperatures to zero at T>300 K and 500 K for R=Sm,Gd and R=Pr,Nd, respectively. At T=100 K the QI is static within the PAC time window, but at T=200 K fluctuations with correlation times tau(C)<10(-6) s, have been detected. These observations can be explained consistently by two assumptions: (i) the mother isotope In-111 of the PAC probe Cd-111 constitutes an attractive potential for vacancies and (ii) the R vacancies in R1-xNi2 are highly mobile at temperatures T<300 K, which is incompatible with a static vacancy superstructure. The measurements indicate a decrease of the vacancy-probe binding energy from the light to the heavy R constituents of R1-xNi2. For R=Pr,Nd,Sm,Gd the binding energy is in the range 0.15-0.40 eV. The activation energy E-A for vacancy jumps near the probe derived from the temperature dependence of the nuclear spin relaxation at 200 Kless than or equal toTless than or equal to300 K is small. The values observed in different samples cover a range of 0.1 eVless than or equal toE(A)less than or equal to0.23 eV. The trial frequency w(0) of these jumps appears to be correlated to the activation energy: ln w(0)(MHz)approximate to58E(A)(eV). At high temperatures T>500 K nuclear spin relaxation related to vacancy hopping is observed in nearly all R1-xNi2. Auxiliary Cd-111 PAC measurements have been carried in Sc0.95Ni2, ScNi2, ScNi0.97, Gd2Ni17, GdNi5, GdNi3, and GdNi.