
Lavrentievite is one of the rarest mercury minerals known, with only two very close known localities worldwide (Arzakskoye, Uyuk Range, Eastern Siberia, Russian Federation). It occurs in this specimen as yellowish aggregates associated to minoritary massive cinnabar. — Photo: David Hospital · CC BY-SA 4.0
Lavrentievite
Lavrentievite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Hg₃S₂Cl₂.
It crystallizes in the triclinic crystal system.
Key properties: Mohs hardness 2–2.5; specific gravity 7.46; Vitreous to adamantine. R1 –R2: n.d luster.
IMA symbol Lvr, IMA status: approved, named in 1984.
Found in the oxidized zone of hydrothermal mercury-bearing deposits (Arzak and Kadyrel deposits, Russia).
It is found associated with Arzakite, cinnabar, corderoite, quartz, kaolinite (Arzak deposit, Russia); bromian calomel, bromian corderoite, bromian eglestonite, kuzminite, mercury.
The name refers to Mikhail Alekseevich Lavrent’ev (1900–1980), Institute of Hydrodynamics, Novosibirsk, Russia, founder of the Siberian Academy of Science.