It has a low work function and one of the highest electron emissivities known, and is stable in vacuum. Stoichiometric samples are colored intense purple-violet, while boron-rich ones (above LaB6.07) are blue. Ion bombardment changes its color from purple to emerald green.
It has a low work function and one of the highest electron emission rates known, and is stable in vacuum. Stoichiometric samples are intensely purple-violet, while boron-rich ones (above LaB6.07) are blue. Ion bombardment alters its color from purple to emerald green.