Images
Formula: TlPbAs2SbS6
Sulphosalt, thallium-, arsenic- and
antimony- bearing mineral
Crystal System: Monoclinic
Specific gravity: 5.24 calculated
Hardness: 2 to 2½
Streak: Dark red
Colour: Black
Environments
Sedimentary environments
Hydrothermal environments
Localities
At the type locality, the Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland, jentschite is very rare in a
hydrothermal deposit in dolostone, in association with
hutchinsonite,
wallisite-hatchite,
edenharterite, bernardite,
sicherite and abundant realgar and
orpiment in small cavities in a
dolomitic rock. The first specimens consisted of extremely small
polysynthetically twinned crystals; a later find yielded less complicated twinned crystals up to 2 mm in length
(MM 61.131–137, HOM).
Back to Minerals