镧镍合金

LaNi
识别
CAS号 12142-63-1  checkY
性质
化学式 LaNi
摩尔质量 197.60 g·mol⁻¹
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

镧镍合金是镧和镍之间形成的合金，存在LaNi5、La2Ni7、LaNi2、LaNi3、La2Ni3、LaNi和La3Ni等多种相。[1]

LaNi5

主条目：镧镍五
LaNi5
英文名 Lanthanum pentanickel
Pentanickel lanthanum
识别
CAS号 12196-72-4  checkY
性质
化学式 LaNi5
摩尔质量 432.37 g·mol⁻¹
外观 金色固体[2]
密度 7.950 g/cm3[3]
溶解性（水） 反应[3]
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

LaNi5是一种金属间化合物，具有CaCu5结构，属六方晶系。[4]它在200°C以上可以被空气氧化。在20°C以上可以和盐酸、硫酸或硝酸反应。[5]可用作加氢反应的催化剂。[6][7]

其它化合物

除了LaNi5之外，还有La2Ni7、LaNi2、LaNi3、La2Ni3、LaNi和La3Ni等多种整比化合物及LaNi2.286（四方晶系，空间群I4̄2m）等非整比化合物[8]。LaxNiy中的镍原子也可以被其它原子取代，如LaNi2.5Co2.5。[9]

参考文献

  1. ^ Picard, G. S.; Mottot, Y. E.; Tremillon, B. L. Study on electrowinning of solid lanthanum-nickel alloys in lithium chloride-potassium chloride eutectic melt. Proceedings - Electrochemical Society, 1984. 84-2. pp 585-602.
  2. ^ 13399 MSDS. Alfa Aesar. [2017-11-18]
  3. ^ 3.0 3.1 镧镍合金 MSDS. Aldrich. [2017-11-18]
  4. ^ Zhang, Yang-huan; Li, Peng-xin; Yang, Tai; Zhai, Ting-ting; Yuan, Ze-ming; Guo, Shi-hai. Effects of substituting La with M (M=Sm, Nd, Pr) on electrochemical hydrogen storage characteristics of A2B7-type electrode alloys. Transactions of Nonferrous Metals Society of China, 2014. 24(12): 4012-4022. DOI:10.1016/S1003-6326(14)63563-9
  5. ^ Goncharuk, A. B.; Endrzheevskaya, S. N. Stability of lanthanum nickel (LaNi5) intermetallide in liquid and gaseous media（俄文）. Poroshkovaya Metallurgiya (Kiev), 1980. 8: 77-79
  6. ^ Imamura, Hayao; Kato, Yuzo; Yamada, Kazuhiro; Tsuchiya, Susumu. Preparation and properties of Raney catalysts from rare earth intermetallic compounds. Applied Catalysis, 1986. 27(2): 243-256. DOI:10.1016/S0166-9834(00)82921-8
  7. ^ 吴富英, 安越, 宋林,等. 氟处理后的镧镍五对乙基咔唑的催化加氢性能[J]. 化学反应工程与工艺, 2015, 31(5):407-411.
  8. ^ A.V. Klimyenko, J. Seuntjens, L.L. Miller, B.J. Beaudry, R.A. Jacobson, K.A. Gschneidner. Structure of LaNi2.286 and the La-Ni system from LaNi1.75 to LaNi2.50. Journal of the Less Common Metals. 1988-11, 144 (1): 133–141 [2018-11-27]. ISSN 0022-5088. doi:10.1016/0022-5088(88)90357-8. （原始内容存档于2019-08-31）. 
  9. ^ Sakai T, Miyamura H, Kuriyama N, et al. The influence of small amounts of added elements on various anode performance characteristics for LaNi2. 5Co2. 5-based alloys[J]. Journal of the Less common Metals, 1990, 159: 127-139.

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