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Fairfieldite & Hureaulite

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SER165442

Fairfieldite & Hureaulite

Description Tabs

Description
Locality: 
Mangualde, Viseu District, Portugal
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 2.2 × 1 cm
Description

White lamellar crystals of fairfieldite on pink hureaulite

Mineral Data
What's on the rock

Fairfieldite

Formula: 
Ca2(Mn2+,Fe2+)(PO4)2·2H2O
Strunz: 
8.CG.05
Hardness: 
3.5
Streak: 
White
Type Locality: 
Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA

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