Mcgillite
A variety of Minerals
What is Mcgillite?
Mcgillite is a rare, monoclinic, pseudohexagonal mineral of the Pyrosmalite group, with the formula Mn2+8Si6O15(OH)8Cl2. It was first approved in 1979, and is named for McGill University. Mcgillite is found in the Sullivan Mine, Kimberley, Kootenay district, British Columbia, Canada; the Kyurazawa mine, Tochigi Prefecture, Japan; and at one location in Romania. At the Sullivan mine, it forms as fracture fillings in a manganese-rich portion of quartzite and argillite within a metamorphosed lead-zinc deposit. It is pink in color.
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Mcgillite Localities Map
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Quick Facts
Physical Properties
- Hardness (Mohs)
- 5
Chemical Properties
- Chemical Formula
- (Mn,Fe)8Si6O15(OH)8Cl2
- Elements
- Cl, H, Mn, O, Si
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