Chukanovite
An iron hydroxide-carbonate of the rosasite group — a rare secondary mineral of iron-bearing deposits.
Intro adapted from Wikipedia (CC BY-SA).
Chukanovite is an IMA-recognized mineral species in the carbonate class, with the chemical formula Fe₂(CO₃)(OH)₂.
It crystallizes in the monoclinic crystal system (space group P2_1/a). It is a member of the Malachite structural group.
Key properties: Mohs hardness 3.5–4; specific gravity 3.6; White streak; Vitreous luster; optically biaxial.
IMA symbol Ckn, IMA status: approved, named in 2005.
Found in a terrestrially altered meteorite fragment.
It is found associated with Kamacite, taenite, chromite, troilite, goethite, akaganeite, hematite, hibbingite, reevesite, honessite, undetermined Fe-Ni sulfides.
The mineral was named to honor Nikita V. Chukanov (b. 1953), Russian physicist and mineralogist.