The structure analysis of the compound [(H3O)(18-Krone-6)]I-7 has been repe
ated. The already known structure could now be described with improved prec
ision. The unique polyiodide chain (1)(infinity)[(I(-.)2I(2)). I-2] map be
derived from the regular three dimensional iodide-iodine lattice (1)(infini
ty)[I(-.)3I(2)] by separation.