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Mineralpedia Details for Mcgillite

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Mcgillite

Mcgillite

Named for McGill University of Montreal in Quebec, Canada where some of the type material for the species is hosted. At the type locality at the Sullivan mine in British Columbia, Canada, Mcgillite forms as fracture fillings in a manganese-rich portion of quartzite and argillite all within a metamorphosed lead-zinc deposit. Mcgillite is rare and occurs on only two other localities in Romania and Japan.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/mcgillite.pdf

Formula
Mn2+8Si6O15(OH)8Cl2 
Crystal System
Monoclinic 
Crystal Habit
Pseudo Hexagonal, Massive 
Cleavage
Good, None, None 
Luster
Pearly 
Color
light pink, dark pink 
Streak
reddish white 
Class
Monoclinic - Prismatic 
Hardness
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Mcgillite from Sullivan mine, Kimberly, British Columbia, Canada

Mcgillite
            from Sullivan mine, Kimberly, British Columbia, Canada

Pink masses in skarn matrix.

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