Talk:Dicopper chloride trihydroxide

From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Chemicals  
WikiProject icon 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.
 ???  This article has not yet received a rating on the project's quality scale.
 ???  This article has not yet received a rating on the project's importance scale.
 

Unlike the name suggests, paratacamite is not a polymorph of atacamite, clinoatacamite and botallackite. It was originally believed to be one, but it was recently discovered that it contains essential zinc in its composition, which stabilizes the structure. A zinc-free mineral with the structure of paratacamite does not exist.

In atacamite, botallackite and clinoatacamite, on the other hand, zinc is not an essential constituent. Entirely zinc-free phases are (meta)stable enough to exist (although naturally occurring material usually contains more or less zinc replacing for copper).

Reference: see http://www.mindat.org/min-3115.html (last entry in the reference section)

--Peter M. Haas (talk) 05:34, 10 December 2010 (UTC)