Gallium--neptunium (3/1) | 59872-04-7

• 分子结构分类: 无机化合物
• 英文名称: Gallium--neptunium (3/1)
• 英文别名: gallane;neptunium
• CAS: 59872-04-7
• 化学式: Ga₃Np
• 分子量: 446.217
• InChiKey: CAEXCIQAZWDSNP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -3.55
• 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：

  氢化镓 、 镎 以 melt 为溶剂， 生成 Gallium--neptunium (3/1)
  参考文献：
  名称：

  Specific heat of the antiferro/ferro-magnet NpGa3

  摘要：

  The specific heat of NpGa3 has been measured for the first time. The magnetic transitions and more generally the full magnetic phase diagram have been re-established precisely. The Sommerfeld coefficient and the magnetic entropy point to a rather localized system, in agreement with previous studies, in particular high pressure Mossbauer and resistivity. The comparison with other NpX3 suggests that NpGa3 is the most localized member of the series. (C) 2010 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jallcom.2010.09.109

文献信息

• Magnetic and electronic properties of cubic Np<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="italic">X</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>intermetallics
  作者：J. Gal、I. Yaar、S. Fredo、I. Halevy、W. Potzel、S. Zwirner、G. M. Kalvius

  DOI：10.1103/physrevb.46.5351

  日期：——

  We report on the magnetic and electronic properties of NpSi3, NpGa3, and NpIn3, which crystallize in the cubic AuCu3 crystallographic structure (space group Pm 3m). Studies by Mossbauer as well as ac and dc magnetization techniques are presented. From the Mossbauer isomer-shift data we argue that the Np ion in NpX3 is close to the formal 3 + (I-5(4)) charge state. The magnetic moment of the Np in NPSi3 is totally suppressed, whereas in NpGa3 a localized (narrow band) moment (1.5-mu(B)) is established. However, in NpIn3 at 4 K, a modulated magnetic moment [(0-1.5)mu(B)] is observed. Comparing the magnetic behavior of the NpX3 family (X = Si, Al, Ga, Ge, Sn, and In), we find an impressive variation of the magnetic properties, from temperature-independent paramagnetism, localized and modulated ordered moments, to the formation of a concentrated Kondo lattice. Hybridization of 5f electrons with ligand electrons appears to play a crucial role in establishing these magnetic properties. However, a consistent theoretical picture cannot be drawn at present.
• Magnetic properties of cubic NpGa3
  作者：E. Colineau、F. Bourdarot、P. Burlet、J.P. Sanchez、J. Larroque

  DOI：10.1016/s0921-4526(96)00836-8

  日期：1997.2

  The cubic (AuCu3-type) NpGa3 compound shown previously to order AF at T-N approximate to 65 K and to undergo a first-order transition to a ferromagnetic state at T-C approximate to 50 K, was investigated by single-crystal neutron diffraction and in-field Mossbauer measurements. The new data confirm the earlier conclusions and provide new information on the magnetic behaviour of NpGa3. The wave vector in the AF phase is k = (1/2 1/2 1/2). The magnetic structure (type II) consists of a simple arrangement of alternating + - + - sheets of ferromagnetic (1 1 1) planes. It is found that the Np moments point along the [1 1 1] direction in the ferromagnetic slate, while it is suggested that they should be along the [1 0 0] direction in the AF phase.
• Magnetic properties of NpGa3
  作者：M.N. Bouillet、T. Charvolin、A. Blaise、P. Burlet、J.M. Fournier、J. Larroque、J.P. Sanchez

  DOI：10.1016/0304-8853(93)90825-m

  日期：1993.7

  Polycrystalline samples of NpG3 having the cubic AuCu3-type structure have been examined by magnetization, resistivity and Np-237 Mossbauer measurements. They show that the antiferromagnetic ordering occurring at about 65 K is replaced through a first-order transition by a ferromagnetic one at 50 K. The saturation Np moment inferred from the hyperfine field data amounts to 1.56mu(B). The analysis of the isomer shift data for the NpX3 Series allows us to conclude the occurrence of Np3+ ions and partial 5f delocalization in NpGa3. The value of the Np ordered moment and of the effective paramagnetic moment can be accounted for by assuming a GAMMA5 crystal field ground state.
• X-ray diffraction studies of AuCu3-type neptunium compounds under pressure
  作者：Y Méresse、S Heathman、T Le Bihan、J Rebizant、M.S.S Brooks、R Ahuja

  DOI：10.1016/s0925-8388(99)00509-5

  日期：2000.1

  NpX3 (AuCu3-type structure) compounds with X=Al, Ga, Ge, In and Sn were studied up to 50 GPa using the energy dispersive X-ray diffraction (EDXRD) technique. No structural phase transitions were observed for any of the compounds studied up to the highest pressures attained. The compressibility was measured for each compound and compared with theory. The results for NpX3 are compared with those previously obtained for UX3. (C) 2000 Published by Elsevier Science S.A. All rights reserved.
• Haga, Yoshinori; Aoki, Dai; Homma, Yoshiya, Journal of the Physical Society of Japan, p. 1 - 3
  作者：Haga, Yoshinori、Aoki, Dai、Homma, Yoshiya、Matsuda, Tatsuma D.、Ikeda, Shugo、et al.

  DOI：——

  日期：——