Connellite

Connellite
Connellite

Connellite
General
Category Halide minerals
Chemical formula Cu19[(OH)32|SO4|Cl4]·3H2O
Strunz classification 03.DA.25
Identification
Color fine blue
Crystal system hexagonal
Mohs scale hardness 3
Luster vitreous
Streak pale green-blue
Diaphaneity translucent
Specific gravity 3.36

Connellite is a very rare mineral species, a hydrous copper chloro-sulfate, Cu19[(OH)32|SO4|Cl4]·3H2O, crystallizing in the hexagonal system. It occurs as tufts of very delicate acicular crystals of a fine blue color, and is associated with other copper minerals of secondary origin, such as cuprite and malachite. Its occurrence in Cornwall was noted by Philip Rashleigh in 1802, and it was first examined chemically by Arthur Connell in 1847. Outside Cornwall it has been found only in Namaqualand in South Africa and at Bisbee, Arizona (USA)

The type locality is Wheal Providence at Carbis Bay in Cornwall.[1]

References

  1. ^ Connellite: Connellite mineral information and data

 This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press. 

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