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Mineralpedia Details for Barysilite

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Barysilite

Barysilite

Named for the Greek words barys, meaning “heavy,” and for the silicon (sil) in the composition. Barysilite is a rare mineral that occurs in iron ores, and as thin films and veinlets in zinc ores with associated garnet, willemite, axinite, and hardtstonite. Localities for Barysilite include in Sweden, the United States, Germany, and Namibia.

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

Formula
Pb8Mn(Si2O7)3 
Crystal System
Trigonal 
Crystal Habit
Massive - Lamellar 
Cleavage
Perfect, None, None 
Luster
Adamantine 
Color
white, gray 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Hardness
WebMineral
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Mindat
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Barysilite from Langban, Varmland, Sweden

Barysilite
            from Langban, Varmland, Sweden

Exceptional clear plates to about 1mm. The photo shows three clear plates, in a fan-like arrangement.

Click thumbnail images for larger view.

Barysilite from Parker Shaft, Franklin, Sussex Co., New Jersey, United States

Barysilite
            from Parker Shaft, Franklin, Sussex Co., New Jersey, United States

Pearly looking cleavage faces of Barysilite throughout matrix. Rich. Ex. Albanese - see prov. tab.

Click thumbnail images for larger view.

Barysilite from Franklin, Sussex Co., New Jersey, United States

Barysilite
            from Franklin, Sussex Co., New Jersey, United States

Pearly looking pink cleavage faces of Barysilite throughout matrix. Rich. The number matches a generic tag.

Click thumbnail images for larger view.

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