Tags: Chemical Substance, Mineral.
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).