  We study chiral symmetry breaking for relativistic fermions, described by a
parity violating Lagrangian in 2+1-dimensions, in the presence of a heat bath
and a uniform external magnetic field. Working within their four-component
formalism allows for the inclusion of both parity-even and -odd mass terms.
Therefore, we can define two types of fermion anti-fermion condensates. For a
given value of the magnetic field, there exist two different critical
temperatures which would render one of these condensates identically zero,
while the other would survive. Our analysis is completely general: it requires
no particular simplifying hierarchy among the energy scales involved, namely,
bare masses, field strength and temperature. However, we do reproduce some
earlier results, obtained or anticipated in literature, corresponding to
special kinematical regimes for the parity conserving case. Relating the chiral
condensate to the one-loop effective Lagrangian, we also obtain the
magnetization and the pair production rate for different fermion species in a
uniform electric field through the replacement $B\to-iE$.
