Copper chloride
Copper forms two stable chlorides:
  • Copper(I) chloride
    Copper(I) chloride
    Copper chloride, commonly called cuprous chloride, is the lower chloride of copper, with the formula CuCl. The substance is a white solid sparingly soluble in water, but very soluble in concentrated hydrochloric acid...

     (cuprous chloride), CuCl, mineral name nantokite.

  • Copper(II) chloride
    Copper(II) chloride
    Copper chloride is the chemical compound with the formula CuCl2. This is a light brown solid, which slowly absorbs moisture to form a blue-green dihydrate. The copper chlorides are some of the most common copper compounds, after copper sulfate....

    (cupric chloride), CuCl2, mineral name eriochalcite.

Detailed information on each of these compounds is found on the specific pages linked above.
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