  We present the results of the observations of some roAp stars made at Mount
Stromlo Observatory during 17 nights in 2001 September-October. This long
observing run permitted us to obtain a good phase-rotation coverage. In
chemically peculiar magnetic stars, the Li I 6708 A spectral line presents very
anomalous behaviour: in some stars it is a strong feature, in others, with
similar atmospheric parameters, it is invisible. Interesting results were
obtained for the roAp star HD 3980 which presents variations of the profile and
position of the Li I line with the rotation period. These new observational
results should serve as a base for the development of atmospheric models of
``Li-spotted'' roAp stars.
