Mikehowardite
Mikehowardite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Fe³⁺₄(V⁵⁺O₄)₄(H₂O)₂·H₂O.
It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Schubnelite structural group.
Key properties: Mohs hardness 3.5; specific gravity 3.19; Yellow-orange streak; Subadamantine luster.
IMA symbol Mhw, IMA status: approved, named in 2021.
A secondary mineral (previously misidentified as fervanite) in a vanadium deposit formed by potassic fenitization near an alkaline intrusion.
It is found associated with Donowensite, bokite.
The mineral was named to honor James Michael (Mike) Howard (b. 1949), staff economic geologist and field mineralogist, Arkansas Geological Commission for 39 years. Mr.