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Iridium(III) chloride
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Iridium(III) chloride : ウィキペディア英語版
Iridium(III) chloride

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Iridium(III) chloride is the inorganic compound with the formula IrCl3. The anhydrous compound is relatively rare, but the related hydrate is useful for preparing other iridium compounds. The anhydrous salt is a dark green crystalline solid. More commonly encountered is the trihydrate IrCl3(H2O)3.
==Preparation==
Iridium is separated from the other platinum group metals as crystalline ammonium hexachloroiridate, (NH4)2(), 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 give iridium(III) chloride. Like the related rhodium compound, IrCl3 adopts the structure seen for aluminium chloride.
Hydrated iridium trichloride is obtained by heating hydrated iridium(III) oxide with hydrochloric acid.

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