Greenish yellow crystals of the very rare mineral lazarenkoite from the type locality: Khovu-Aksy, Tuva, Siberia, Russian Federation. Lazarenkoite is one of the very few arsenites known. Ex. Dr. Hartel collection. — Photo: David Hospital · CC BY-SA 4.0
Lazarenkoite
Lazarenkoite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula CaFe³⁺As³⁺₃O₇·3H₂O.
It crystallizes in the orthorhombic crystal system.
Key properties: Mohs hardness 1; specific gravity 3.45; Resinous to silky luster; optically biaxial.
IMA symbol Laz, IMA status: approved, named in 1980.
Found in the oxidation zone of a metallic ore deposit.
It is found associated with Annabergite, skutterudite, löllingite.
The mineral was named to honor Academician Evgenii Konstantinovich Lazarenko (1912–1979), mineralogist, Lvov University, Lvov, Ukraine.