Palladium(II) iodide

• Palladiumdiiodid
• Palladium iodide
• Palladium iodide (deprecated)

Black solid

Fixed

6.003 g · cm -3

350 ° C ( decomposition)

Slightly soluble in water

Attention

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Palladium ( II) iodide is an inorganic chemical compound of palladium from the group of iodides.

Production and representation

Palladium (II ) iodide can be obtained by reaction of a very dilute solution of palladium in nitric acid with sodium iodide at 80 ° C.

The high-temperature modification of α - palladium ( II) iodide may be prepared by reaction of the elements at a reaction temperature above 600 ° C. The γ - modification is formed as a finely crystalline, almost X-ray amorphous powder by precipitation of palladium (II ) compounds with iodine salts from aqueous H2PdCl4 solution at room temperature. When heated, this modification in dilute hydriodic solution, these converts to the β - phase from about 140.degree.

Properties

Palladium ( II) iodide is an almost X-ray amorphous, black powder. It is insoluble in acids, but insoluble in a potassium iodide solution. The connection comes in three modifications. The α - modification has an orthorhombic crystal structure with space group Pnmn.