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