Potassium Thiocyanoplatinate, K2Pt(CNS)6, is formed when a warm solution of potassium thiocyanate is added to one of chlor-platinic acid or to a suspension of potassium chlor-platinate in water. It crystallises in red hexagonal prisms, the parameters being:
a: с = 1: 0.7829.
Density 2.342 at 18° C. The dihydrate, K2Pt(CNS)6.2H2O, is known. It yields rhombic crystals:
a:b:c = 0.6224: 1: 0.9712. |