  We present in this work energy levels, oscillator strengths, radiative decay
rates and fine structure collision strengths for the Mg III and Al IV ions. The
11 configurations:(1s$^{2}$) 2s$^{2}$2p$^{6}$, 2s$^{2}$2p$^{5}3l$,
2s2p$^{6}3l$, 2s$^{2}$2p$^{5}4l$ ($l\leq n-1$, where $n$ is the principal
quantum number), yielding the lowest 75 levels are used. The collisional data
for these two ions are missing in the literature, especially the database
CHIANTI, this is the principal motivation behind the present work. Calculations
have been performed using the AUTOSTRUCTURE code. AUTOSTRUCTURE treats the
scattering problem in the distorted wave approach. Fine structure collision
strengths are calculated for a range of electron energies from 10 Ry to 240 Ry.
The atomic structure data are compared to available experimental and
theoretical results.
