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Arrojadite-(KNa)

• KNa₄CaFe²⁺₁₃Al(PO₄)₁₁(HPO₄)(OH)₂
• KNa₄Ca(Fe²⁺,Mn²⁺,Mg)₁₃Al(PO₄)₁₁(HPO₄)(OH,F)₂
• [K⁺Na⁺][Na⁺₂][Ca²⁺][Na⁺₂][][Fe²⁺₁₃][Al³⁺][(OH)₂|HPO₄|(PO₄)₁₁]^37-

• Class: Arrojadite group
• Class: Phosphate - Hydroxide
• Radioactive: Very weak

• Na₂ => Fe²⁺: Arrojadite-(KFe)

• KNa => Ba: Arrojadite-(BaNa)

• OH => F: Fluorarrojadite-(KNa)

• Color: Pale yellow
• Luster: Vitreous
• Diaphaneity: Opaque

• System: Monoclinic
• Group: m, Cc
• Lattice: a=16.6, b=10.1, c=24.6, β=106.5