gunningite
{{Short description|Mineral in the Kieserite group}}
{{Infobox mineral
| name = Gunningite
| category = Sulfate minerals
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| image = Gunningite.jpg
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| caption = Gunningite
| formula = {{chem2|(Zn,Mn^{2+})SO4*H2O}}
| molweight =
| strunz = 7.CB.05
| dana = 29.6.2.5
| system = Monoclinic
| class = Prismatic (2/m)
(same H-M symbol)
| symmetry = C2/c
| color = White to colorless
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| cleavage = Indistinct
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| mohs = 2.5
| luster = Vitreous
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| diaphaneity = Translucent
| gravity = 3.195
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| opticalprop = Biaxial (+)
| refractive = nα = 1.570 nβ = 1.576 nγ = 1.630
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| references = http://rruff.geo.arizona.edu/doclib/hom/gunningite.pdf Handbook of Mineralogy{{cite web|title=Gunningite|url=http://www.mindat.org/min-1778.html|website=mindat.org|publisher=Hudson Institute of Mineralogy|access-date=October 10, 2020}}http://www.webmineral.com/data/Gunningite.shtml Webmineral data
}}
Gunningite is one of the minerals in the Kieserite group, with the chemical formula {{chem2|(Zn,Mn^{2+})SO4*H2O}}. Its name honours Henry Cecil Gunning (1901–1991) of the Geological Survey of Canada and a professor at the University of British Columbia.
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 United States (Nevada and Arizona), Switzerland (Valais), Greece (Attica) and Germany (Baden-Württemberg).