Crystal structure of strontium thiosulfate monohydrate

SrS2O3 center dot H2O was obtained from an aqueous solution of Na2S2O3 and Sr(NO3)(2) and crystallizes in space group P (1) over bar with all atoms at general positions. The Sr2+ ion exhibits an [8 + 1] coordination defined by two terminal S and six O atoms of thiosulfate ions, one of the latter at a longer distance, and by one O atom of a water molecule. Two thiosulfate anions act as bidentate, four as monodentate ligands. The structure consists of mainly ionically interacting layers lying parallel to the crystallographic ab plane. The layers are connected by O-H center dot center dot center dot S and O-H center dot center dot center dot O hydrogen bonds of moderate strength.