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Crookesite & Klockmannite

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JYJ743130

Crookesite & Klockmannite

SEM-EDS confirmed specimen 2-1,5,6,7

Description Tabs

Description
Locality: 
Skrikerum Mine, Valdemarsvik, Östergötland County, Sweden
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.8 × 1.7 × 0.8 cm
Description

A polished section, SEM-EDS analysed. hosting crookesite (point 2-6,5), klockmannite (point 2-7) and clausthalite (point 2-1) in calcite matrix. Analysis points are given in the first image (light reflective image).

Analysis and reports 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