Na3Fe2(PO4)3 is related to the ''Nasicon'' family of ionic conductors,
with corner linked FeO6 octahedra and PO4 tetrahedra. SQUID and neutr
on diffraction measurements are described which show that magnetic ord
ering at 47K gives a canted anti-ferromagnetic ground state with mu(Fe
) = 4.5mu(B).