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Mineralpedia Details for Devilline

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Devilline

Devilline

Named for Henri Etienne Sainte-Claire Deville, who was a French chemist of the 1800’s whose most important work was in inorganic and thermal chemistry and had many experiments in the artificial preparation of minerals. Devilline is an uncommon mineral that occurs in localities in England, Slovakia, Germany, Italy, Namibia, Japan, New Zealand, the United States and many others. It forms as a secondary mineral in oxidized copper sulfide deposits and can be found of post-mine origin in dumps and on timbers. Devilline is soluble in water.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/devilline.pdf

Formula
CaCu4(SO4)2(OH)6·3H2
Crystal System
Monoclinic 
Crystal Habit
Spherical, Platy, Tabular 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous - Pearly 
Color
blue, blue green, blue white, white, dark green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2.5 
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Devilline from Jean Baptiste mine, Laurion district, Attika, Greece

Devilline
            from Jean Baptiste mine, Laurion district, Attika, Greece

Bright blue Devilline to 1.5mm with nice, clear selenite crystals.

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