Main Page | See live article | Alphabetical index Copper oxide is a substance formed when copper oxidizes. There are two forms, copper (I) oxide (cuprous oxide Cu2O) a red powder and copper (II) oxide (cupric oxide CuO) a black powder. It has some scientific uses, including use as a superconductor. The mineral cuprite, a red colored crystal, is copper I oxide. This article is a stub. You can help Wikipedia by fixing it. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.