  New electrodynamics with quaternionic mass is found to yields interesting
results. The quaternionic mass involves longitudinal as well as transverse
(vector) masses. Because of these two masses, an application of a magnetic
field in a system induces electric charge and current densities in the system.
Frank Wilczek axion electrodynamics is derived from this new electrodynamics
bearing a quantum signature. A new version of Maxwell-Proca equations that are
invariant under the gauge transformations is derived from the new
electrodynamics. New electric and magnetic fields that are different from the
standard formalism are proposed to describe massive electrodynamics. Axion
electrodynamics are shown to be equivalent to Proca electrodynamics. The energy
and momentum conservation equations are not influenced by the quaternionic
mass.
