• Online only
Birnessite
search
  • Birnessite

Birnessite

€14.00
Fresh, black, prismatic birnessite in altered ussingite
Karnasurt, Lovozero, Kola peninsula, Russia
Quantity
Available

Fresh, black, prismatic birnessite in altered ussingite. A quite nice specimen for the species
AN_334
1 Item

Data sheet

Locality
Karnasurt, Lovozero, Kola peninsula, Russia
Size category
Miniature
Size (cm)
5 x 2 x 3.3
Weight
45 g
Formula
(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Properties
Black; soft and brittle; shiny on unaffected surfaces