Home Braunite
IV - Oxides

Name   Braunite
Chemistry   Mn7[O8|SiO4]
Hardness   6 - 6.5
Lustre   greasy metallic
Colour   iron black to brownish black
Streak   black, brownish grey black
Density [g/cm3]   4.7 - 4.9
Crystal habit   tetragonal, crystals often small, similar to octahedrons
Cleavage, Fracture   fracture uneven
other characteristics and occurrences   massive, grained aggregates, metamorph as well as metasomatic in limestones and dolomites, could be classified among the silictaes as well

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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