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Rittmannite

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CHA641770

Rittmannite

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Description
Locality: 
Assunção Mine, Aldeia Nova, Sátão, Viseu District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.1 × 1.2 × 1 cm
Description

specimen with many very nice brownish colour crystals of rittmanite on matrix

Mineral Data
What's on the rock

Rittmannite

Formula: 
{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
3.5
Type Locality: 
Cubos-Mesquitela-Mangualde area, Mangualde, Viseu District, Portugal

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