  Sigma-phase Fe65.9V34.1 alloy was investigated with the M\"ossbauer
spectroscopy. M\"ossbauer spectra were recorded in the temperature interval of
80-300 K. Their analysis in terms of the hyperfine distribution protocol
yielded the average hyperfine field, <B>, the average center shift, <CS>, and
the spectral area, A. The magnetic ordering temperature, T_C=312.5(5) K was
determined from the temperature dependence of <B>, and the Debye temperature,
T_D, from the temperature dependence of <CS> and the relative spectral area.
The value obtained from the former was 403(17) K and that from the latter
374(2) K. The value of the force constant was determined. The lattice dynamics
of Fe atoms was described in terms of the kinetic, E_k, and the potential
energy, E_p.
