Abstract

A fine structure of the Mossbauer line of the new alpha 2-Sn allotropic form has been observed. The isomeric shifts of five alpha 2-Sn substructures have been determined. The Mossbauer data have been considered together with X-ray diffraction ones. It is shown that the isomeric shift increases when the lattice parameter of alpha 2-Sn substructure decreases. Magnetic measurements of the susceptibility of samples containing a significant quantity of alpha 2-Sn have been carried out. The problem with the alpha 2-Sn isomeric shift interpretation has been discussed. Considerations have been given to the causes of the formation of the new crystalline structures.

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