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Mineralpedia Details for Hausmannite

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Hausmannite

Hausmannite

Named to honor former Professor of Mineralogy at the University of Gottingen in Germany, Johan Friedrich Ludwig Hausmann. It is an uncommon mineral, but widespread and with many localities. Hausmannite occurs in hydrothermal veins and also forms from the metamorphism of manganese-rich rocks. Localities for Hausmannite include Germany, Sweden, Wales, England, the United States, Canada, Brazil, Australia, South Africa, and Namibia, and others including some of economic importance.

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

Formula
Mn2+Mn3+2O4 
Crystal System
Tetragonal 
Crystal Habit
Massive - Granular, Pseudo Octohedral 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
brownish black, grayish 
Streak
dark reddish brown 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Uneven 
Hardness
5.5 
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Hausmannite from N'Chwaning II mine, Kalahari Mn fields, Northern Cape Province, South Africa

Hausmannite
            from N'Chwaning II mine, Kalahari Mn fields, Northern Cape Province, South Africa

Black, octahedral Hausmannite crystal to 1.5cm with Andradite.

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