Yarlongite
Yarlongite is an IMA-recognized mineral species in the organic mineral class, with the chemical formula (Cr₄Fe₄Ni)C₄.
It crystallizes in the hexagonal crystal system (space group P6_3/m).
Key properties: Mohs hardness 5.5–6; specific gravity 7.19; Black streak; Metallic luster.
IMA symbol Ylg, IMA status: approved, named in 2007.
Found in heavy mineral separates from an ophiolitic podiform chromitite.
It is found associated with Cohenite, tongbaite, khamrabaevite, qusongite, diamond, moissanite, wüstite, iridium ("osmiridium"), osmium ('iridosmine"), periclase, chromite, native iron.
The name comes from the first part of the name of the river, Yarlong Zangbo River, near the Luobusha ophiolite.
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 Y minerals or help write this entry.