Grammatikopoulosite
Grammatikopoulosite is an IMA-recognized mineral species in the native element class, with the chemical formula NiVP.
It crystallizes in the orthorhombic crystal system (space group Pnma). It is a member of the Barringerite structural group.
Key properties: specific gravity 7.085; Metallic luster.
IMA symbol Gmk, IMA status: approved, named in 2020.
Found in a heavy mineral concentrate separated from podiform chromitite hosted in strongly serpentinized dunite from a mantle tectonite composed of harzburgite and minor intercalations of plagioclase-bearing lherzolite.
It is found associated with Tsikourasite, nickelphosphide, awaruite.
The mineral was named to honor Tassos Grammatikopoulos (b. 1966), geoscientist at the SGS Canada Inc., for his contributions to the economic mineralogy and mineral deposits of Greece.