Strontium Platinocyanide, SrPt(CN)₄

Strontium Platinocyanide, SrPt(CN)₄.5H₂O, is most easily obtained by boiling the copper derivative with aqueous strontium hydroxide. The crystals form monoclinic tablets, milky white in colour, but exhibiting a delicate violet surface-tint and a green fluorescence. The crystallographic elements are:

а: b: с = 0.6850: 1: 0.4657. p = 94° 49'.

At 160° C. the salt becomes white and anhydrous. By crystallising mixed solutions of strontium and potassium platinocyanides the double salt Strontium Potassium Platinocyanide, SrK₂[Pt(CN)₄]₂.4H₂O, is obtained.