Gunningite

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Gunningite is one of the minerals in the Kieserite group. Its chemical formula is (Zn,Mn2+)SO4·H2O. Its name honours Dr. Henry Cecil Gunning (1901–1991) of the Geological Survey of Canada and a Professor at the University of British Columbia, Vancouver, Canada.

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[edit] Occurrence

Gunningite is rare. It is found in dry areas of the oxidized portions of sphalerite-bearing deposits. It has been noted in mines in Canada (Yukon Territory, British Columbia and New Brunswick), the US (Nevada and Arizona), Switzerland (Valais), Greece, Attica and Germany (Baden-Württemberg).

[edit] Details

Crystallographic system Monoclinic
Colours White to colorless.
Lustre Vitreous
Hardness ~2.5

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[edit] References