“…[SnS 4 ] 4– , [Sn 2 S 6 ] 4– , [Sn 2 S 5 ] 2– , [Sn 2 S 7 ] 6– , [Sn 2 S 8 ] 2– , [Sn 3 S 7 ] 2– , [Sn 4 S 9 ] 2– , [Sn 4 S 10 ] 4– , or [Sn 5 S 12 ] 4– . Charge compensation is achieved by different cations including main group metal cations, [ 1–9 ] combinations of main group and transition metal cations, [ 10–22 ] transition metal cations and/or complexes, [ 23–34 ] and organic ammonium and/or metal cations. [ 35–40 ] Several of these compounds exhibit interesting physico‐chemical properties like second harmonic generation, [ 17,18 ] efficient ion exchange behavior for rare earth cations, [ 41 ] promising properties as anode materials in lithium ion batteries, [ 39 ] selective heavy metal cation sequestration from aqueous solutions, [ 8 ] photoconductivity, [ 28 ] or photocatalytic activity for dye degradation, [ 30 ] to name just a few.…”