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Rittmannite Phosphosiderite & Hureaulite

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SER784798

Rittmannite Phosphosiderite & Hureaulite

Type Locality

Description Tabs

Description
Locality: 
Regada, Mangualde, Viseu District, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 2.5 × 1.2 cm
Description

Two tiny yellow clusters of rittmannite in the center of purple balls of phosphosiderite and pink blades of hureaulite

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

Phosphosiderite

Formula: 
FePO4·2H2O
Strunz: 
8.CD.05
Hardness: 
3.5 - 4.0
Type Locality: 
Kalterborn Mine, Eiserfeld, Siegerland, North Rhine-Westphalia, Germany

Hureaulite

Formula: 
(Mn,Fe)5(PO4)2(HPO4)2·4H2O
Strunz: 
8.CB.10
Hardness: 
5.0
Type Locality: 
Les Hureaux, Saint-Sylvestre, Haute-Vienne, Limousin, France