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Birnessite

€14.00
Black crystal fragments in ussingite
Karnasurt, Lovozero, Kola Peninsula, Russia
Quantity
Available

Black, tabular crystal fragments in altered ussingite
AN_529
1 Item

Data sheet

Locality
Karnasurt, Lovozero, Kola Peninsula, Russia
Size category
Miniature
Size (cm)
4.5 x 3.5 x 3
Weight
21 g
Formula
(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Properties
Sub-Vitreous, dull; black