IMA mineral species

Fermiite

Na₄(UO₂)(SO₄)₃·3H₂O

Hydrous uranyl sulfate mineral.

YellowGreen

Properties

Chemical formulaNa₄(UO₂)(SO₄)₃·3H₂O
ElementsNa, U, O, S, H
Crystal systemOrthorhombic
Mohs hardness—
Density—
Streakwhite
Color—
IMA symbolFmi

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

🌍 Where it's found

Type locality (where it was first described): Blue Lizard mine, United States

  • Type locality
  • Notable source / deposit
  • Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.