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Torbernite & Autunite

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TPX778933

Torbernite & Autunite

Radioactive

Description Tabs

Description
Locality: 
Pinhal do Souto Mine, Tragos, Mangualde, Viseu District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 5 × 4.3 cm
Weight: 
125.00gr
Description

Spectacular specimen of green torbernite and autunite crystals on quartz matrix from this little know Portuguese site nowadays closed, possibly several other uranium minerals not identified by me are also present, no more samples of this mine are easily found in the market. This old specimen was collected by Adonis, a mineral dealer, 30 years ago. All these pieces are protected by an acrylic resin bath (Paraloid) to prevent the inhalation of mineral dust. If you wish, the paraloid bath can be removed simply by dipping the piece in acetone.

Mineral Data
What's on the rock

Torbernite

Formula: 
Cu(UO2)2(PO4)2·12H2O
Strunz: 
8.EB.05
Crystal System: 
Tetragonal
Hardness: 
2.0 - 2.5
Type Locality: 
Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany

Autunite

Formula: 
Ca(UO2)2(PO4)2·11H2O
Strunz: 
8.EB.05
Crystal System: 
Tetragonal
Hardness: 
2.0 - 2.5
Type Locality: 
Saint-Symphorien-de-Marmagne, Montcenis, Saône-et-Loire, Burgundy, France

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