Lanthanum-nickel alloy

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

LaNi

Identifiers
CAS Number	12142-63-1 Y
Properties
Chemical formula	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

LaNi5

Main article: lanthanum pentanickel

LaNi₅

Names
Other names Lanthanum pentanickel Pentanickel lanthanum
Identifiers
CAS Number	12196-72-4 Y
Properties
Chemical formula	LaNi5
Molar mass	432.37
Appearance	gold solid[2]
Density	7.950 g/cm3[3]
Solubility in water	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 LaNi_2.286 (tetragonal, space group I4̄2m).^[8] The nickel atoms in La_xNi_y can also be replaced by other atoms, such as LaNi_2.5Co_2.5.^[9]

See also

• List of named alloys

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. 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". Transactions of Nonferrous Metals Society of China. 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{{Country data {{{1}}} | flag link/core | variant = | size = | name = | altlink = national rugby union team | altvar = rugby union}}. 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". Applied Catalysis. 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 (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. Archived from the original on 2019-08-31. Retrieved 2018-11-27.{{cite journal}}: CS1 maint: multiple names: authors list (link)
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.