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Proustite Nickelskutterudite & Smaltite

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CLB54755

Proustite Nickelskutterudite & Smaltite

Ex Technische Universität Freiberg, Sachsen
With Antique Label

Description Tabs

Description
Locality: 
Niederschlema, Bad Schlema, Erzgebirge, Saxony, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3 × 3 cm
Largest Crystal: 
0.50cm
Description

Very interesting specimen. The old label shows old names and must be explained: "speiskobalt" was another name for skutterudite and smaltite (which is the arsenic-deficient variety of skutterudite), chloanthite is a arsenic-deficient variety of nickelskutterudite, proustite is proustite and if there is dolomite at all we wouldn't care.

However this is a very interesting specimen with a lot to discover.

Mineral Data
What's on the rock

Proustite

Formula: 
Ag3AsS3
Strunz: 
2.GA.05
Crystal System: 
Trigonal
Hardness: 
2.0 - 2.5

Nickelskutterudite

Formula: 
NiAs3-x
Strunz: 
2.EC.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.0
Streak: 
Black
Type Locality: 
Schneeberg District, Erzgebirge, Saxony, Germany

Smaltite

Variety Of: 

Skutterudite

Formula: 
CoAs3-x
Strunz: 
2.EC.05
Hardness: 
5.5 - 6.0
Formula: 
(Co,Fe,Ni)As2
Hardness: 
0.0

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