Lanthanum forms several alloys with nickel, including LaNi5, La2Ni7, LaNi2, LaNi3, La2Ni3, LaNi and La3Ni etc.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.
LaNi5
LaNi5 is an intermetallic compound with a CaCu5 structure. It belongs to the hexagonal crystal system. It can be oxidized by air above 200 °C, and react with hydrochloric acid, sulfuric acid or nitric acid above 20 °C.Goncharuk, A. B.; Endrzheevskaya, S. N. Stability of lanthanum nickel (LaNi5) intermetallide in liquid and gaseous media. Poroshkovaya Metallurgiya (Kiev), 1980. 8: 77-79 LaNi5 can be used as a catalyst for hydrogenation reactions.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.
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). The nickel atoms in LaxNiy can also be replaced by other atoms, such as LaNi2.5Co2.5.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.
See also List of named alloys
References