Neutron Powder Diffraction Study of Sr2SnO4 and Ba2SnO4

Abstract

The structures of Sr₂SnO₄ (I 4/mmm, a 4·0528(1), c 12·5852(5) Å) and Ba₂SnO₄ (I 4/mmm, a 4·1428(1), c 13·2993(4) Å) have been refined from neutron powder diffraction data by the Rietveld method. The results show the SnO₆ polyhedra are not regular octahedra but are either elongated or compressed along the c direction depending on the dimension of the AO layer in these A₂SnO₄-type compounds.