To use all functions of this page, please activate cookies in your browser.
my.chemeurope.com
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
CyanotrichiteCyanotrichite is a copper aluminium sulfate mineral, Cu4Al2(OH)12SO4·2H2O, also known as lettsomite, very similar to halotrichite, and a member of the same group. However, it is much rarer. It forms velvety aggregates of extremely fine fibres and radial aggregates. It crystallizes in the orthorhombic system and forms translucent bright blue acicular crystal clusters or drusey coatings. The Mohs hardness is 2 and the specific gravity ranges from 2.74 to 2.95. Refractive indices are nα=1.588 nβ=1.617 nγ=1.655. It is an oxidation product of primary copper mineralization in a weathering environment with abundant aluminium and sulfate. Associated minerals include brochantite, spangolite, chalcophyllite, olivenite, tyrolite, parnauite, azurite and malachite. Additional recommended knowledgeThe main deposits are Cap la Garrone in the Var (France), Romania and Arizona (USA). Because of its beautiful colouring, it is very popular with collectors. It was first described in 1839 from Moldova Nouă, Banat, Romania. The name is from Greek kyaneos for "blue" and triches for "hair" referring to the typical color and habit. References
Categories: Copper minerals | Aluminium minerals | Hydroxide minerals | Sulfate minerals |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Cyanotrichite". A list of authors is available in Wikipedia. |