  In this paper, the quaternionic Dirac equation is solved for quaternionic
potentials, iV0+jW0. The study shows two different solutions. The first
solution contains particles and anti-particles and leads to the diffusion,
tunneling and Klein energy zones. The complex limit is recovered from this
solution. The second solution, which does not have a complex counterpart, can
be seen as a V0-antiparticle or |W0|-particle.
