Liveingite Locality: Lengenbach Quarry , Im Feld (Imfeld; Feld; Fäld), Binn Valley, Wallis (Valais) , Switzerland ( Locality at mindat.org ) Field of view 8 mm. Specimen and photo Leon Hupperichs. — Photo: Leon Hupperichs · CC BY-SA 3.0
Liveingite
Liveingite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Pb₂₀As₂₄S₅₆.
It crystallizes in the monoclinic crystal system (space group P2_1/c). It is a member of the Sartorite structural group.
Key properties: Mohs hardness 3; specific gravity 5.3; Chocolate-brown streak; Metallic. Anisotropism: Distinct. R1 –R2: (400) 40.0–43.0, (420) 39.3–42.6, (440) 38.6–42.2, (460) 38.0–41.8 luster.
IMA symbol Liv, grandfathered status — known before the IMA’s founding, named in 1901.
Hydrothermal in origin.
It is found associated with Pyrite, sphalerite.
In honor of George D. Liveing (1827–1924), Professor of Chemistry, Cambridge University, Cambridge, England.