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Lanthanum-nickel alloy

Topic: Chemistry

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LaNi
Identifiers
Properties
LaNi
Molar mass 197.60
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Lanthanum forms several alloys with nickel, including LaNi5, La2Ni7, LaNi2, LaNi3, La2Ni3, LaNi and La3Ni etc.[1]

LaNi5

LaNi5
Names
Other names
Lanthanum pentanickel
Pentanickel lanthanum
Identifiers
Properties
LaNi5
Molar mass 432.37
Appearance gold solid[2]
Density 7.950 g/cm3[3]
reacts with water[3]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

LaNi5 is an intermetallic compound with a CaCu5 structure. It belongs to the hexagonal crystal system.[4] It can be oxidized by air above 200 °C, and react with hydrochloric acid, sulfuric acid or nitric acid above 20 °C.[5] LaNi5 can be used as a catalyst for hydrogenation reactions.[6][7]

Other alloys

In addition to LaNi5, there are other alloys such as La2Ni7, LaNi2, LaNi3, La2Ni3, LaNi, and La3Ni, and nonstoichiometric alloys such as LaNi2.286 (tetragonal, space group I4̄2m).[8] The nickel atoms in LaxNiy can also be replaced by other atoms, such as LaNi2.5Co2.5.[9]

See also

References

  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 Sigma-Aldrich Co., Lanthanum-nickel alloy. Retrieved on 2017-11-18.
  4. ↑ Zhang, Yang-huan; Li, Peng-xin; Yang, Tai; Zhai, Ting-ting; Yuan, Ze-ming; Guo, Shi-hai (December 2014). "Effects of substituting La with M (M=Sm, Nd, Pr) on electrochemical hydrogen storage characteristics of A2B7-type electrode alloys" (in en). Transactions of Nonferrous Metals Society of China 24 (12): 4012–4022. doi:10.1016/S1003-6326(14)63563-9. https://linkinghub.elsevier.com/retrieve/pii/S1003632614635639. 
  5. ↑ Goncharuk, A. B.; Endrzheevskaya, S. N. Stability of lanthanum nickel (LaNi5) intermetallide in liquid and gaseous mediaTemplate:Ru. Poroshkovaya Metallurgiya (Kiev), 1980. 8: 77-79
  6. ↑ Imamura, Hayao; Kato, Yuzo; Yamada, Kazuhiro; Tsuchiya, Susumu (January 1986). "Preparation and properties of raney catalysts from rare earth intermetallic compounds" (in en). Applied Catalysis 27 (2): 243–256. doi:10.1016/S0166-9834(00)82921-8. https://linkinghub.elsevier.com/retrieve/pii/S0166983400829218. 
  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 (November 1988). "Structure of LaNi2.286 and the La-Ni system from LaNi1.75 to LaNi2.50". Journal of the Less Common Metals 144 (1): 133–141. doi:10.1016/0022-5088(88)90357-8. ISSN 0022-5088. https://linkinghub.elsevier.com/retrieve/pii/0022508888903578. Retrieved 2018-11-27. 
  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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