Delessite

 Delessite is a mineral variety, a magnesium-rich form of chamosite which is a member of the chlorite group. Delessite has the chemical formula (Mg,Fe,Fe,Al)(Si,Al)

4O
10
(O,OH)
8
.

This article uses material from the Wikipedia article
 Metasyntactic variable, which is released under the 
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Note

This article uses material from the Wikipedia article
 Metasyntactic variable, which is released under the 
Creative Commons
Attribution-ShareAlike 3.0 Unported License
.