Jentschite
Jentschite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula TlPbAs₂SbS₆.
It crystallizes in the monoclinic crystal system (space group P2_1/n).
Key properties: Mohs hardness 2–2.5; specific gravity 5.24; Dark red streak; Metallic to submetallic. Anisotropism: Distinct. R1 –R2: (470) 29.7–35.4, (543) 28.8–33.1, (587) 26.7–30.3 luster.
IMA symbol Jts, IMA status: approved, named in 1993.
Very rare in a hydrothermal deposit in dolostone.
It is found associated with Realgar, orpiment, hutchinsonite, hatchite, wallisite, edenharterite, bernardite, sicherite.
In honor of Franz Jentsch (1868–1908), an early prolific collector of Lengenbach minerals.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
Browse more J minerals or help write this entry.