Ammonium Chloriridite, (NH₄)₃IrCl₆

Ammonium Chloriridite, (NH₄)₃IrCl₆.Aq., prepared either by reduction of ammonium chloriridate or by decomposing the sodium salt with concentrated ammonium chloride solution, yields dark, olive-green, orthorhombic prisms, which readily dissolve in water. It is probably the monohydrate, (NH₄)₃IrCl₆.H₂O. Upon ignition, metallic iridium alone remains, in spongy form. The decomposition begins to be appreciable just above 200° C.