Copper(I) iodide

Cuprous

Gray to white powder (anhydrous)

Fixed

5.62 g · cm -3 ( 20 ° C)

602 ° C

1290 ° C

13.3 hPa at 656 ° C

Sparingly soluble in water (80 mg · l-1 at 18 ° C )

Attention

0.1 mg · m-3

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Copper ( I) iodide is the copper salt of hydriodic acid. In a completely pure state it is a white powder.

Properties

Because of the electron configuration d10 are copper (I ) compounds are diamagnetic. Copper iodide crystallizes in the sphalerite.

Structure

It has a complex phase diagram, which represents the existence of multiple crystal forms. Copper iodide is tetrahedrally coordinated when it is in the zinc blende structure. The atomic distance between copper and iodine atom is 2.338 Å.

Production and representation

In the laboratory, copper (I ) iodide to be prepared by mixing a copper ( II) salt (usually copper sulfate solution ) and a solution of potassium iodide. This produces copper ( II) iodide:

This is very unstable and rapidly decays:

In the industrial preparation of iodine vapor is directed to copper metal: