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Mineralpedia Details for Brandtite

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Brandtite

Brandtite

Named for Swedish chemist George Brandt. Found in metamorphosed iron-manganese and zinc orebodies in localities in Sweden, Germany, Switzerland, the Czech Republic, Kazakhstan, the United States, Chile, and South Africa, among some others. Minerals associated with Brandtite include lead, sarkinite, flinkite, caryopilite, galena, baryte, calcite, rhodochrosite, sphalerite, franklinite, willemite, chalcopyrite, and lollingite.

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

Formula
Ca2Mn2+(AsO4)2ยท2H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Striated, Radial 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, white 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
3.5 
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Brandtite from Harstigen mine, Filipstad, Värmland, Sweden

Brandtite
            from Harstigen mine, Filipstad, Värmland, Sweden
Special Info
Type Locality

Colorless crude to well-crystallized crystals of the rare arsenate mineral, Brandtite. The crystals are elongated blades from 0.5 to 1mm and radial fans to 3mm.

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Brandtite from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States

Brandtite
            from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States

Colorless, platy radiating crystals to 3mm.

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