Nickolayite
Nickolayite is an IMA-recognized mineral species in the native element class, with the chemical formula FeMoP.
It crystallizes in the orthorhombic crystal system (space group Pnma). It is a member of the Barringerite structural group.
Key properties: Mohs hardness 5–6; specific gravity 7.819; Metallic luster.
IMA symbol Nkl, IMA status: approved, named in 2019.
An accessory phase in fused clinopyroxene-plagioclase rocks. Probably connected to co-reduction of molybdenum- and phosphorus-bearing minerals during high-temperature pyrometamorphism.
It is found associated with Baryte, tridymite, chromite, hematite, pyrrhotite, fluorapatite, titanite, powellite. Distribution From the Jizah District, Amman Governorate, Jordan.
The mineral was named to honor Dieter Nickolay (b. 1941), German mineral collector and mineralogist, for his contributions to systematic mineralogy.