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Mimetite & Segnitite

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SER761531

Mimetite & Segnitite

Description Tabs

Description
Locality: 
Lagoa Mine, Estorãos, Ponte de Lima, Viana do Castelo District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.1 × 2.5 cm
Description

a vug in quartzite hosts several white elongated crystals of mimetite on a carpet of yellow segnitite that covers also some mimetite crystals

Mineral Data
What's on the rock

Mimetite

Formula: 
Pb5(AsO4)3Cl
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Treue Freundschaft Mine, Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany

Segnitite

Formula: 
PbFe3+3(AsO4)2(OH,H2O)6
Strunz: 
8.BL.10
Crystal System: 
Trigonal
Hardness: 
4.0
Type Locality: 
Kintore opencut, Broken Hill, Yancowinna Co., New South Wales, Australia
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