  Polycrystalline samples of Fe2BiMO7 (M = Sb, Ta) compounds with
pyrochlore-type structure were synthesized for the first time by the molten
salts method. The compounds were obtained in one hour at 950 C. The structures
were determined by Rietveld refinement. Through M\"ossbauer spectroscopy and
X-ray photoelectron spectroscopy, the site occupancies and ionic states of the
cations in the pyrochlore structure were investigated.Polycrystalline samples
of Fe2BiMO7 (M = Sb, Ta) compounds with pyrochlore-type structure were
synthesized for the first time by the molten salts method. The compounds were
obtained in one hour at 950 C. The structures were determined by Rietveld
refinement. Through M\"ossbauer spectroscopy and X-ray photoelectron
spectroscopy, the site occupancies and ionic states of the cations in the
pyrochlore structure were investigated.
