The defect structures of these compounds were studied by using 57Fe and 119Sn Mössbauer spectroscopy and first-principles binomial distribution calculations. It was shown that the Fe and Sn sites exhibited differing local interactions of the atoms located in the same structural position of the defect structure. An analysis of the data, together with theoretical calculations, showed that defect formation in the samples had a thermal cause. The experimental and theoretical data showed that the defect structure was locally ordered.

Defective Structure of the ThFe0.2Sn2 and PrFe0.4Sn2 Compounds. T.Spataru, P.Manfrinetti, A.Palenzona, P.Blaha, M.L.Fornasini, G.Principi: Intermetallics, 2002, 10[5], 423-7