Reederite-(y)
Reederite-(Y)
A variety of Minerals
What is Reederite-(y)?
Reederite-(Y) is a rare mineral with the formula (Na,Mn,Fe)15(Y,REE)2(CO3)9(SO3F)Cl. It is the only known mineral with fluorosulfate (fluorosulfonate). "REE" in the formula stands for rare earth elements other than yttrium, that is mostly cerium, with traces of neodymium, dysprosium, lanthanum and erbium. The formula also includes a Levinson suffix "-(Y)" pointing to the dominance of yttrium at the corresponding site. Reederite-(Y) crystallizes in the hexagonal crystal system with the space group P6, rarely seen among minerals.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Reederite-(y) 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.
Quick Facts
Physical Properties
- Color
- Yellow to orange-brown
- Hardness (Mohs)
- 3 - 3.5
- Rock tumbling
- Not recommended
- Streak
- White
Chemical Properties
- Chemical Formula
- (Na,Mn)15Y2(CO3)9(FSO3)Cl
- Elements
- C, Cl, F, Mn, Na, O, S, Y
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Reederite-(y) FAQs
How do I identify Reederite-(y)?
Reederite-(y) can be identified by its hardness of 3 - 3.5 on the Mohs scale, Yellow to orange-brown color. Look for these key characteristics when examining specimens.
What color is Reederite-(y)?
Reederite-(y) typically appears in Yellow to orange-brown. Color can vary depending on impurities and formation conditions.
How hard is Reederite-(y)?
Reederite-(y) has a hardness of 3 - 3.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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