Ferroselite Mineral Data

General Ferroselite Information
Chemical Formula:	FeSe2
Composition:	Molecular Weight = 213.77 gm
	Iron 26.13 % Fe
	Selenium 73.87 % Se
	______
	100.00 %
Empirical Formula:	Fe²⁺Se₂
Environment:	In red-bed deposits of the Colorado Plateau type, peripheral to pyrite and uranium concentrations.
IMA Status:	Valid Species (Pre-IMA) 1955
Locality:	In the USA, at several localities in Utah, on the Colorado Plateau, including the A.E.C. no. 8 mine, Temple Mountain, Emery Co. Link to MinDat.org Location Data.
Name Origin:	For the composition.
Name Pronunciation:	Ferroselite + Pronunciation
Synonym:	Hastite
	ICSD 25680
	PDF 21-432