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Mineralpedia Details for Plattnerite

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Plattnerite

Plattnerite

Named for Carl Friedrich Plattner, who was a Professor of Metallurgy and Assaying at the Mining Academy in Freiberg, Germany. Plattnerite can be found in weathered metal deposits of hydrothermal origin that have been oxidized in arid climates, typically. Localities include Scotland, Iran, Namibia, the United States, and Mexico, among other minor localities.

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

Formula
PbO2 
Crystal System
Tetragonal 
Crystal Habit
Massive, Encrustations, needle-like millimeter size crystals 
Cleavage
None, None, None 
Luster
Sub Metallic 
Color
brownish black, iron black, black 
Streak
chestnut brown 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Brittle 
Hardness
5.5 
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Plattnerite from Mina Ojuela, Mapimi, Durango, Mexico

Plattnerite
            from Mina Ojuela, Mapimi, Durango, Mexico

Acicular black, shiny, Plattnerite coating Aurichalcite and Mimetite. Crystals to less than 1mm.

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