Talk:Copper oxide

	This article is within the scope of WikiProject Chemicals, a daughter project of WikiProject Chemistry, which aims to improve Wikipedia's coverage of chemicals. To participate, help improve this article or visit the project page for details on the project.ChemicalsWikipedia:WikiProject ChemicalsTemplate:WikiProject Chemicalschemicals articles
???	This article has not yet received a rating on the project's importance scale.

Lists

	This article is within the scope of WikiProject Lists, an attempt to structure and organize all list pages on Wikipedia. If you wish to help, please visit the project page, where you can join the project and/or contribute to the discussion.ListsWikipedia:WikiProject ListsTemplate:WikiProject ListsList articles
???	This article has not yet received a rating on the project's importance scale.

Why is more CuO formed than Cu2O? Does it have a higher enthalpy of formation? This would be great if it could be added to the article.

Copper(III) Oxide (percupric oxide, Cu₃O), the main product when copper is heated in air. It is not common.

Deleted by me, can anyone correct this for usage? Wslack 15:56, 5 July 2006 (UTC)[reply]

I'm not an expert, but I recently learned in chem class that the roman numerals refer to the charge of the cation, not to the number of atoms within the compound. Cu(III) would mean Cu³⁺, not Cu₃. If there is a copper(III) oxide, then given this, I'm pretty sure it would have to be Cu₂O₃ to balance out the charges. A couple of quick google searches indicate that this is either non-existent or a very rare (artificial?) compound called "copper sesquioxide". --Icarus ^(Hi!) 03:45, 3 October 2006 (UTC)[reply]