  It was recently shown that conventional phonon-electron interactions may
induce a triplet pairing state in time-reversal invariant 3D Dirac semi -
metals. Starting from the microscopic model of the isotropic Dirac semi-metal,
the Ginzburg-Landau equations for the vector order parameter is derived using
the Gor'kov technique. The collective modes including gapless Goldstone modes,
and gapped Higgs modes of various polarizations are identified. They are
somewhat analogous to the modes in the B phase of He3, although in the present
case quantitatively there is a pronouneced difference between longitudinal and
transverse components. The difference is caused by the vector nature of the
order parameter leading to two different coherence lengths or penetration
depths. The system is predicted to be highly dissipative due to the Goldstone
modes. The time dependent Ginzburg - Landau model in the presence of external
fields is used to investigate some optical and magnetic properties of such
superconductors. The AC conductivity of a clean sample depends on the
orientation of the order parameter. It is demonstrated that the difference
between the penetration depths results in rotation of the polarization vector
of microwave passing a slab made of this material. The upper critical magnetic
field H_{c2} was found. It turns out that at fields close to H_{c2} the order
parameter orients itself perpendicular to the field direction. In certain range
of parameters the triplet superconducting phase persists at arbitrarily high
magnetic field like in some p wave superconductors.
