Abstract
The system La2(CO3)3-NiCO3-H2O and separate fragments of the systems Ni(OH)3-NiCO3-H2O and LaNiO2.5-CO2-H2O were studied by the isothermal crystallization technique. The compounds La2(CO3)3·8H2O, LaNi5(CO3)6.5·xH2O, and Ni(CO3)0.6(OH)0.8·3H2O and solid solutions based on lanthanum carbonate and lanthanum-nickel mixed carbonates were detected in the system. The intermetallic compound LaNi5, which is highly competitive in characteristics with LaNi5 cast alloy, was obtained by reduction of LaNi5(CO3)6.5·xH2O.
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