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Chalcothallite

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JYJ561755

Chalcothallite

Description Tabs

Description
Locality: 
Kvanefjeld, Ilímaussaq, Narsaq, Kujalleq, Greenland
Class: 
Single Crystal
Size Range: 
Micromount (under 1cm)
Size: 
0.13 × 0.11 × 0.03 cm
Description

Black, irdiscent reflective chalcothallite in a capsula. Mineral is only from Greenland so far and is associated with ussingite veins in polikilitic sodalite syenite. 

Mineral Data
What's on the rock

Chalcothallite

Formula: 
Tl2(Cu,Fe)6SbS4
Strunz: 
2.BD.40
Crystal System: 
Tetragonal
Hardness: 
2.0 - 2.5
Streak: 
Black
Type Locality: 
Nakalak Mt (Nakalaq; Nakkaalaaq), Taseq area, Ilímaussaq complex, Narsaq, Kujalleq, Greenland