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Crookesite & Klockmannite

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JYJ728521

Crookesite & Klockmannite

Description Tabs

Description
Locality: 
Skrikerum Mine, Valdemarsvik, Östergötland County, Sweden
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.1 × 1.9 × 1 cm
Description

SEM-EDS analysed polished section hosting grey metallic crookesite (2-6, 2-5 (arrow 2)), dark bluish klockmannite (2-7) and grey clausthalite. 

Analysis attached. 

 

Mineral Data
What's on the rock

Crookesite

Formula: 
Cu7(Tl, Ag)Se4
Strunz: 
2.BD.50
Crystal System: 
Tetragonal
Hardness: 
2.5 - 3.0
Colour: 
Lead Grey
Type Locality: 
Skrikerum Mine (Skrickerum Mine), Valdemarsvik, Östergötland, Sweden

Klockmannite

Formula: 
CuSe
Strunz: 
2.CA.05b
Hardness: 
2.0 - 2.5
Type Locality: 
Las Asperezas mine (Sarmiento deposit; Veta Sarmiento), Sierra de Cacho, Villa Castelli, General Lamadrid department, La Rioja, Argentina
Analysis
Analysis Report - only: Crookesite & Klockmannite
Analysis Report - only: Crookesite & Klockmannite
Analysis Report - only: Crookesite & Klockmannite
Analysis Report - only: Crookesite & Klockmannite
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