Ferrimolybdite
A variety of Minerals
What is Ferrimolybdite?
Ferrimolybdite is a hydrous iron molybdate mineral with formula: Fe2(MoO4)3·8(H2O) or Fe2(MoO4)3·n(H2O). It forms coatings and radial aggregates of soft yellow needles which crystallize in the orthorhombic system.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ferrimolybdite 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.
Ferrimolybdite Localities Map
See where Ferrimolybdite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Ferrimolybdite
It was first described in 1914 for an occurrence in the Alekseevskii Mine in the Karysh River Basin, Khakassia Republic, Siberia, Russia. It was named for its composition (ferric iron and molybdenum). It occurs as an oxidation product of molybdenum bearing ore deposits. Associated minerals include: molybdenite, pyrite and chalcopyrite.
Quick Facts
Physical Properties
- Color
- Yellow, canary yellow, or sulfur yellow, greenish yellow; colourless to canary-yellow in transmitted light
- Hardness (Mohs)
- 1 - 2
- Density
- 3.085 g/cm³
- Streak
- Light yellow
Chemical Properties
- Chemical Formula
- Fe2(MoO4)3 · nH2O
- Elements
- Fe, H, Mo, O
Also Known As
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Ferrimolybdite FAQs
How do I identify Ferrimolybdite?
Ferrimolybdite can be identified by its hardness of 1 - 2 on the Mohs scale, Yellow color. Look for these key characteristics when examining specimens.
What color is Ferrimolybdite?
Ferrimolybdite typically appears in Yellow, canary yellow, or sulfur yellow, greenish yellow; colourless to canary-yellow in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Ferrimolybdite?
Ferrimolybdite has a hardness of 1 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
What is the formation of ferrimolybdite of Ferrimolybdite?
It was first described in 1914 for an occurrence in the Alekseevskii Mine in the Karysh River Basin, Khakassia Republic, Siberia, Russia. It was named for its composition (ferric iron and molybdenum). It occurs as an oxidation product of molybdenum bearing ore deposits. Associated minerals include: molybdenite, pyrite and chalcopyrite.
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