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Formula: CuPbAsS3
Sulpharsenite,
bournonite group,
forms a series with bournonite
Crystal System: Orthorhombic
Specific gravity: 5.38 to 5.44 measured, 5.43 calculated
Hardness: 3
Streak: Black
Colour: Lead grey, dark lead grey, black
Common impurities: Ag,Zn,Fe,Sb
Environments:
Localities
At the Bleikvassli Mine, Bleikvasslia, Hemnes, Nordland, Norway, seligmannite is associated with
tennantite, jordanite and
dufrénoysite
(HOM).
At the Palomo Mine, Huachocolpa District, Huancavelica Province, Huancavelica, Peru, seligmannite crystals to 1 mm have
been found rarely covering galena or sphalerite
surfaces, associated with younger realgar crystals and
orpiment
(Minrec 39.2.99).
At the type locality, the Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland, seligmannite occurs in cavities in
dolostone, associated with tennantite,
sphalerite, pyrite,
dufrénoysite, rathite and
baumhauerite
(HOM).
At the Bingham Mining District, Oquirrh Mountains, Salt Lake county, Utah, USA, a specimen has been found consisting of a small
mass of granular pyrite containing two cavities whose walls of crystallised
pyrite are coated in turn with sphalerite
and tennantite. Last to form in the cavity are seligmannite crystals up to
3 mm across
(AM 13.402-405 ).
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