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Mineralpedia Details for Beudantite

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Beudantite

Beudantite

An uncommon mineral named for Francois Sulpice Beudant, a French mineralogist of the University of Paris in France. Beudantite occurs as a secondary mineral in oxidized polymetallic deposits in localities in Germany, France, England, Greece, Namibia, Mexico, the United States, and Australian, among several others. Associated minerals include carminite, scorodite, mimetite, dussertite, arseniosiderite, pharmacosiderite, olivenite, Bayldonite, duftite, anglesite, cerussite, and azurite. Tabular yellow-green to green, red, brown, or black tabular crystals that can form as pseudo-cubes, pseudo-octahedra, and microcrystalline masses.

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

Formula
PbFe3+3(AsO4)(SO4)(OH)6 
Crystal System
Trigonal 
Crystal Habit
Blocky - Rhombohedral, Druse, Platy 
Cleavage
Perfect, None, None 
Luster
Adamantine 
Color
brown, green, yellow, dark green, orange 
Streak
greenish yellow 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle 
Hardness
WebMineral
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Mindat
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Beudantite from San Rafael mine, Nye Co., Nevada, United States

Beudantite
            from San Rafael mine, Nye Co., Nevada, United States

Extremely tiny pseudo-octahedral, brown crystals lining many vugs in this specimen.

Yellowish green compact micro crystals of Beudantite to less than 0.5mm.

Lime green or yellow-green compact micro crystals to less than 0.5mm with good coverage associated with green cuprian Adamite.

Click thumbnail images for larger view.

Beudantite from Richmond Sitting Bull mine, Galena, Lawrence Co., South Dakota, United States

Beudantite
            from Richmond Sitting Bull mine, Galena, Lawrence Co., South Dakota, United States

Yellow-brown microcrystalline Beudantite crystals.

Click thumbnail images for larger view.

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