Mineralpedia Details for 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)₆·3H₂O 

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 

WebMineral

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Mindat

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