Raslakite
A variety of Minerals
What is Raslakite?
Raslakite is a rare mineral of the eudialyte group with the formula Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)SiO(Si9O27)2(Si3O9)2(OH,H2O)3(Cl,OH). This formula is based on the original one, and is extended to show the presence of cyclic silicate groups. The additional silicon and oxygen shown in separation from the cyclic groups (in parentheses) are in fact connected with two 9-fold rings. The mineral has lowered symmetry (space group R3, instead of more specific for the group R3m one), similarly to some other eudialyte-group members: aqualite, labyrinthite, oneillite and voronkovite. The specific feature of raslakite is, among others, the presence of sodium and zirconium at the M2 site. Raslakite was named after Raslak Cirques located nearby the type locality.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Raslakite 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.
Raslakite Localities Map
See where Raslakite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Raslakite
Raslakite was discovered, together with ikranite, in peralkaline pegmatites of the Mt. Karnasurt, Lovozero massif, Kola Peninsula, Russia. Raslakite is associated with aegirine, fluorcaphite, kazakovite, lamprophyllite, microcline, nepheline, and terskite.
Quick Facts
Physical Properties
- Color
- brownish red
- Hardness (Mohs)
- 5
- Density
- 2.95 g/cm³
- Streak
- white
Chemical Properties
- Chemical Formula
- Na15Ca3Fe2+3(Na,Zr)3Zr3(Si,Nb)(Si3O9)2(Si9O27)2SiO3(Cl,OH)
- Elements
- Ca, Cl, Fe, H, Na, Nb, O, Si, Zr
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Raslakite FAQs
How do I identify Raslakite?
Raslakite can be identified by its hardness of 5 on the Mohs scale, brownish red color. Look for these key characteristics when examining specimens.
What color is Raslakite?
Raslakite typically appears in brownish red. Color can vary depending on impurities and formation conditions.
How hard is Raslakite?
Raslakite has a hardness of 5 on the Mohs scale. This gives it moderate hardness.
What is the formation of raslakite of Raslakite?
Raslakite was discovered, together with ikranite, in peralkaline pegmatites of the Mt. Karnasurt, Lovozero massif, Kola Peninsula, Russia. Raslakite is associated with aegirine, fluorcaphite, kazakovite, lamprophyllite, microcline, nepheline, and terskite.
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