Puneet Varma (Editor)

Connellite

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Category
  
Halide mineral

Crystal system
  
Hexagonal

Strunz classification
  
3.DA.25

Space group
  
P63/mmc

Connellite

Formula(repeating unit)
  
Cu19(OH)32(SO4)Cl4·3H2O

Crystal class
  
Dihexagonal dipyramidal (6/mmm)H-M symbol: (6/m 2/m 2/m)

Connellite is a 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, England, was noted by Philip Rashleigh in 1802, and it was first examined chemically by Prof Arthur Connell FRSE in 1847, after whom it is named.

The type locality is Wheal Providence at Carbis Bay in Cornwall. Outside Cornwall it has been found in over 200 locations worldwide including Namaqualand in South Africa and at Bisbee, Arizona (US).

References

Connellite Wikipedia


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