The polymorphic modifications alpha, beta, and gamma Fe2WO6 of the iron (II
I) tungstate have been investigated by resistivity and electron paramagneti
c resonance (EPR) measurements. The high-electrical resistivity for all pha
ses complies with the dominant antiferromagnetic component of the compounds
. The EPR spectra comprise a broad exchange narrowed EPR line due to Fe3+ i
ons. The broadening of the EPR linewidth is explained in terms of the criti
cal spin fluctuations near the antiferromagnetic phase transition. The shif
t of the resonance field and the temperature dependence-of the EPR intensit
y imply an extended region of short-range order correlations. [S0163-1829(9
9)09535-1].