Grey edenharterite with red realgar. Ex Valentin Sicher collection. From Lengenbach Quarry, Fäld, Binn Valley, Wallis, Switzerland. — Photo: Brent Lockhart · CC0
Edenharterite
Edenharterite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula TlPbAs₃S₆.
It crystallizes in the orthorhombic crystal system (space group Fdd2).
Key properties: Mohs hardness 2.5–3; specific gravity 5.09; Raspberry-red streak.
IMA symbol Eht, IMA status: approved, named in 1987.
Found in a hydrothermal deposit in dolostone.
It is found associated with Baumhauerite, realgar, orpiment, hutchinsonite, hatchite, wallisite, lorandite, sartorite, jentschite, erniggliite, stalderite, bernardite.
The mineral was named to honor Dr. Andreas Edenharter (1933–), University of Göttingen, Göttingen, Germany, who had previously synthesized the compound.