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Pyrolusite Psm Manganite

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NST651408

Pyrolusite Psm Manganite

Description Tabs

Description
Locality: 
Imini Mine, Ouarzazate Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 7 × 5.2 cm
Largest Crystal: 
3.50cm
Description

Radial sprays of shiny metallic crystals on matrix from a sedimentary manganese deposit of Cretaceous age. Appartently the "pyrolusite" from Imini have been analyzed beeing manganites partially replaced by pyrolusite.

Mineral Data
What's on the rock

Pyrolusite

Formula: 
MnO2
Strunz: 
4.DB.05
Hardness: 
2.0 - 6.5

Manganite

Formula: 
Mn3+O(OH)
Strunz: 
4.FD.15
Hardness: 
4.0
Type Locality: 
Manganese deposit, Ilfeld, Nordhausen, Harz, Thuringia, Germany