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Eucairite Tiemannite Umangite

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JYJ522742

Eucairite Tiemannite Umangite

Description Tabs

Description
Locality: 
Sierra de Cacho, General Lamadrid Department, La Rioja, Argentina
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1.3 × 0.6 cm
Description

EDS analysed sample hosting eucairite and tiemannite in umangite matrix.

See analysis. 

Mineral Data
What's on the rock

Eucairite

Formula: 
AgCuSe
Strunz: 
2.BA.50
Hardness: 
2.5
Streak: 
Shining
Type Locality: 
Skrikerum Mine (Skrickerum Mine), Valdemarsvik, Östergötland, Sweden

Tiemannite

Formula: 
HgSe
Strunz: 
2.CB.05a
Hardness: 
2.5
Streak: 
Black
Type Locality: 
St Lorenz Mine, Burgstatt veins, Clausthal-Zellerfeld, Harz, Lower Saxony, Germany

Umangite

Formula: 
Cu3Se2
Strunz: 
2.BA.25
Crystal System: 
Tetragonal
Hardness: 
3.0
Streak: 
Black
Type Locality: 
Trogtal Quarries, Lautenthal, Harz, Lower Saxony, Germany
Analysis
Analysis Report - only: Eucairite Tiemannite Umangite