  We determine the rates and energy and angular distributions of the
positronium decays into a photon and a neutrino-antineutrino pair,
Ps-->gamma+nu+anti-nu. We find that both positronium spin states have access to
this decay channel, contrary to a previously published result. The low-energy
tails of the spectra are shown to be sensitive to the binding effects and agree
with Low's theorem. Additionally, we find a connection between the behaviour of
the soft photon spectrum in both o-Ps-->gamma+nu+anti-nu and o-Ps-->3gamma
decays, and the Stark effect.
