Note:  Do not rely on this information. It is very old.


Cerium (Ce. at. wt. 140, sp. gr. 6.72), a rare malleable and lustrous metal, occurring with others in cerite and a few other minerals. It burns in air with great brilliancy, and forms two oxides, Ce.2O3 and CeO2, and yields series of salts corresponding to both these.