frankamenite
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thumb | right | alt=A sample of charoitite with frankamenite, Siberia, Russia | A sample of charoitite with frankamenite, Siberia, Russia Frankamenite is the fluorine-dominate variation of the rare mineral canasite with a general formula of K3Na3Ca5(Si12O30)[F,(OH)]4·(H2O).
Wikidata facts
- Subclass of
- inosilicate
- Image
- Charoitite with frankamenite.png
Show 5 more facts
- Nickel-Strunz 9th edition (updated 2009)
- 9.DG.90
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.DG.90
- IMA Mineral Symbol
- Fkm
- Commons category
- Frankamenite
- chemical formula
- K₃Na₃Ca₅(Si₁₂O₃₀)(F,OH)₄·H₂O
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Encyclopedic overview
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thumb | right | alt=A sample of charoitite with frankamenite, Siberia, Russia | A sample of charoitite with frankamenite, Siberia, Russia Frankamenite is the fluorine-dominate variation of the rare mineral canasite with a general formula of K3Na3Ca5(Si12O30)[F,(OH)]4·(H2O).
Frankamenite belongs to the triclinic crystal system, with the bases of its structure containing Ca-Na mixed octahedra joined by octagonal tubes SiO4 of the composition (Si12O30). Frankamenite has six Ca-Na mixed positions distributed amongst these octahedra, reflecting its varying compositions.
Excerpted from Wikipedia’s “frankamenite” article, available under the CC BY-SA 4.0 licence.