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Franckeite

#29858

Franckeite

#29858
Availability
Sold
Size
4 x 2 x 3 cm - Miniature 
Formula
Fe2+(Pb,Sn2+)6Sn4+2Sb3+2S14 (RRUFF)
Locality
Mt. Bischoff mine, Waratah, Tasmania, Australia

At one time this deposit hosted one of the world's richest tin mine. This specimen of Frackeite is rich in tin and hosted within Siderite. The Frankeite is typical with highly reflective metallic plates.

Franckeite

Formula
Fe2+(Pb,Sn2+)6Sn4+2Sb3+2S14 
Crystal System
Triclinic 
Crystal Habit
Tabular, Massive - Fibrous, Radial 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
grayish black, blackish gray 
Streak
grayish black 
Class
Triclinic - Pinacoidal 
Fracture
Flexible 
Hardness
2.5 

Data courtesy of Webmineral.

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