Gunningite
Gunningite is one of the minerals in the Kieserite group, with the chemical formula (Zn,Mn2+)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.
| Gunningite | |
|---|---|
Gunningite | |
| General | |
| Category | Sulfate minerals |
| Formula (repeating unit) | (Zn,Mn2+)SO4·H2O |
| IMA symbol | Gun |
| Strunz classification | 7.CB.05 |
| Dana classification | 29.6.2.5 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | C2/c |
| Identification | |
| Color | White to colorless |
| Cleavage | Indistinct |
| Mohs scale hardness | 2.5 |
| Luster | Vitreous |
| Diaphaneity | Translucent |
| Specific gravity | 3.195 |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.570 nβ = 1.576 nγ = 1.630 |
| References | |
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