Abstract

The new compounds BaPtSn 3, BaNiSn 3 and SrNiSn 3 have been prepared and their crystal structures determined. They crystallize in the tetragonal system ( I4 mm) with 2 formula units in the cell with lattice constants: BaPtSn 3, a = 485 ± 1 pm, c = 1107 ± 2 pm, c a = 2.28 ; BaNiSn 3, a = 482 ± 1 pm, c = 1093 ± 2 pm, c a = 2.27 ; SrNiSn 3, a = 474 ± 1 pm, c = 1088 ± 2 pm, c a = 2.30 . The structure can be described as a split variant of the ThCr 2Si 2 structure type.

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