  We study stable axially and spherically symmetric spatial solitons in plasma
with diatomic ions. The stability of a soliton against the collapse is provided
by the interaction of induced electric dipole moments of ions with rapidly
oscillating electric field of a plasmoid. We derive the new cubic-quintic
nonlinear Schrodinger equation which governs the soliton dynamics and
numerically solve it. Then we discuss the possibility of implementation of such
plasmoids in realistic atmospheric plasma. In particular, we suggest that
spherically symmetric Langmuir solitons, described in the present work, can be
excited at the formation stage of long-lived atmospheric plasma structures. The
implication of our model for the interpretation of the results of experiments
for the plasmoids generation is discussed.
