The field evaporation mass spectra of LaB6 were obtained using a time-of-flight atom-probe field ion microscope in vacuum and in the presence of hydrogen, nitrogen and oxygen. The spectra were consistent with a preferential chemisorption of these gases on boron sites.

ToF Atom-Probe FIM Study of LaB6 Single Crystals. Nakamura, S., Ng, Y.S., Tsong, T.T., McLane, S.B.: Surface Science, 1979, 87[2], 656-64