Fermiite

A variety of Minerals

What is Fermiite?

Fermiite is a rare uranium mineral with the formula Na4(UO2)(SO4)3·3H2O. Chemically related minerals include oppenheimerite, meisserite (which is also structurally-related to fermiite), belakovskiite, natrozippeite and plášilite. Fermiite comes from the Blue Lizard mine, San Juan County, Utah, USA, which is known for many rare uranium minerals. The name honors Enrico Fermi (1901–1954).

Market Value Factors

Pricing varies for every rock and mineral, so use these universal factors to gauge Fermiite before comparing listings or appraisals.

Size & Weight

Larger, intact specimens usually command higher prices.

Rarity & Demand

Scarce material or popular varieties sell at a premium.

Condition & Finish

Chips, repairs, and heavy wear lower value; clean prep helps.

Treatment & Provenance

Untreated specimens with documented locality are prized.

Applies to all rocks & minerals.

Key Characteristics

Composition of Fermiite

The main building block of the crystal structure of fermiite is a chain of the composition (UO2)(SO4)3. Chains are connected with five types of Na-O polyhedra.

Quick Facts

Physical Properties

Color: Pale greenish-yellow
Hardness (Mohs): 2.5
Rock tumbling: Not recommended
Density: 3.313 g/cm³
Streak: White

Chemical Properties

Chemical Formula: Na₄(UO₂)(SO₄)₃·3H₂O
Elements: H, Na, O, S, U

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Fermiite FAQs

How do I identify Fermiite?

Fermiite can be identified by its hardness of 2.5 on the Mohs scale, Pale greenish-yellow color. Look for these key characteristics when examining specimens.

What color is Fermiite?

Fermiite typically appears in Pale greenish-yellow. Color can vary depending on impurities and formation conditions.

How hard is Fermiite?

Fermiite has a hardness of 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.

What is the composition of fermiite of Fermiite?

The main building block of the crystal structure of fermiite is a chain of the composition (UO2)(SO4)3. Chains are connected with five types of Na-O polyhedra.