Biotite

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Biotite
Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola

Item-No.: MIN5470
Price: 72.00 EUR 
Biotite
Freita Mountain, Arouca, Aveiro District, Portugal

Item-No.: MIN5506
Price: 100.00 EUR 
Biotite
Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola

Item-No.: MIN6064
Price: 80.00 EUR 
Biotite
Mabubas Pegmatite, Mabubas, Ambriz City Council, Bengo Province, Angola

Item-No.: MIN6224
Price: 85.00 EUR 
Biotite
Dolní Bory, Moravia, Czech Republic

Item-No.: MINS1525
Price: 12.00 EUR 
Biotite
Dolní Bory, Moravia, Czech Republic

Item-No.: MINS1643
Price: 12.00 EUR 
Biotite
Dolní Bory, Moravia, Czech Republic

Item-No.: MINS1301
Price: 12.00 EUR 

Synonyms:  Black Mica, Dark Mica, Meroxen, Oderite, Odenite, Odite 
Classification:  Phyllosilicates, a series or subgroup of the Mica Group, As single mineral not recognised by the IMA 1999
Chemical formula:  K(Mg,Fe2+)3(Si3Al)O10(OH,F)2
Crystal system:  Monoclinic
Density (g/cm3):  2,77 - 3,3
Tenacity:  Flexible
Cleavage:  Perfect on {0001}
Fracture:  Micaceous
Hardness (Mohs):  2 - 3
Colour:  Black, brown, greenisch or redisch black
Lustre:  Vitreous, Pearly
Streak:  White, grey-white
Application:  Insulation in electrotechnology

 

 


 

 
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