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Birnessite

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SHS39140

Birnessite

Description Tabs

Description
Locality: 
San Juan de Moró, Castellón, Valencian Community, Spain
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.6 × 2.3 cm
Description

Dark brown birnessite with rancieite on matrix

Mineral Data
What's on the rock

Birnessite

Formula: 
(Na,Ca)0.5(Mn4+,Mn3+)2O4·1.5H2O
Strunz: 
4.FL.45
Crystal System: 
Orthorhombic
Hardness: 
1.5
Type Locality: 
Birness, Ellon, Buchan Grampian (Aberdeenshire), Scotland, UK