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Fluor-schorl

Year of discovery: 2011 (Steinberg, Germany, and Le Cave, Grasstein, Italy), 2011 (Japan)

Locality list: 3 localities of fluor-schorl

• NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₃F
• [Na⁺][Fe²⁺₃][Al³⁺₆][(OH)₃|F|(BO₃)₃|(SiO₃)₆]^25-

• Class: Alkali-subgroup 1 < Alkali-tourmaline group < Tourmaline supergroup
• Class: Cyclosilicate (Single ring) - Borate - Fluoride - Hydroxide
• Radioactive: Very weak

• Fe => Mg: Fluor-dravite
• Fe => Mn: Fluor-tsilaisite

• Fe₂ => LiAl: Fluor-elbaite

• F => OH: Schorl

• NaAl => CaMg: Fluor-dravite

• FeF => AlO: Oxy-schorl

• Fe²⁺₃(OH)₃ => Fe³⁺₃O₃: Fluor-buergerite

• Color: Pale brown, Bluish gray
• Streak: Brown
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: No
• Hardness: 7.5

• System: Trigonal
• Group: 3m, R3m
• Lattice: a=16.0, c=7.2