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Carrollite

Carrollite

MNHN N°203.142

visu_69 infos
FROM : Kamoya, Kambove, Democratic Republic of the Congo
SIZE : 9.5 x 7.8 cm

general description

This sample shows well-formed crystals of carrollite, associated to iridescent yellow chalcopyrite (CuFeS2) on white calcite (CaCO3). Here, carrolite is made of gray crystals whith a metallic luster, faces are very luster. It measures 9.5 x 7.8 cm.

This sample comes from Kamoya, in the Democratic Republic of the Congo. The Muséum national d’Histoire naturelle obtained this specimen thanks to support from Total. It is kept in the storage rooms of the collections of the Muséum (i.e., not yet displayed to the public).

Photography: Louis-Dominique Bayle, © MNHN.
The Species page
Identity card
SPECIE : Carrollite

HISTORY : Named inspired from its type-locality: Carroll Co, USA

Species first described in 1852 by W.L. Faber

Type-locality: Mine Patapsco, Finksburg, Caroll Co, Maryland, USA

CHEMICAL FORMULA : Cu (Co,Ni)2 S4
CRYSTAL SYSTEM : Cubic
COLOR : Steel gray
DIAPHANIETY : Opaque
LUSTER : Metallic
STREAK : White
MORPHOLOGY : Octahedral crystals, massive
HARDNESS : 4,5-5,5
DENSITY : 4,83

CHEMICAL CLASS : II - Sulfures, sulfosels
GROUP : Linnaeite
STRUNZ CLASS BEFORE 2001 : 2/D.01-40
STRUNZ CLASS AFTER 2001 : 2.DA.05
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