Phase relations and hydrogen absorption in the lanthanum-nickel system

https://doi.org/10.1016/0022-5088(72)90191-9Get rights and content

Abstract

The LaNi system has been reinvestigated in the range 50–100 at. % Ni. The following compounds were observed: LaNi, LaNi1.4, LaNi2, LaNi3, La2Ni7 and LaNi5. For these compounds the lattice constants have been determined. The phase LaNi5 has a relatively large homogeneity region at elevated temperatures. For the compounds LaNix within this region the equilibrium hydrogen pressure, p, of the 40 °C isotherms was found to change from 2.75 atm for LaNi4.9 to about 9.2 atm for LaNi5.4 according to In p = Cx + q with C = 2.4, q = − 10.75.

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