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Birnessite
€8.00
Black crystal section in ussingiteKarnasurt, Lovozero, Kola peninsula, Russia
Sooty black 2 cm crystal section in ussingite
AN_204
1 Item
Data sheet
- Locality
- Karnasurt, Lovozero, Kola peninsula, Russia
- Size category
- Small miniature
- Size (cm)
- 3.5x3x2
- Weight
- 25 g
- Formula
- (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
- Properties
- Black, soot-like. Soft and brittle. Shiny on unaffected surfaces
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Black crystal section in ussingiteKarnasurt, Lovozero, Kola peninsula, Russia