Preparation
Iridium is separated from the other platinum group metals as crystalline ammonium hexachloroiridate(IV), (NH4)2 (CAS number ), which can be reduced to iridium metal in a stream of hydrogen. The spongy Ir thus produced reacts with chlorine at 300–400 °C to produce iridium(III) chloride. Like the related rhodium compound, IrCl3 adopts the structure seen for aluminium chloride.
The hydrated form is obtained by heating hydrated iridium(III) oxide with hydrochloric acid.
Read more about this topic: Iridium(III) Chloride
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