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Fluor-elbaite

Year of discovery: 2011 (Urubu mine, Brazil, and Cruzeiro mine, Brazil), 2011 (Japan)

Locality list: 4 localities of fluorelbaite

• Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₃F
• [Na⁺][Li⁺_1.5Al³⁺_1.5][Al³⁺₆][(OH)₃|F|(BO₃)₃|(SiO₃)₆]^25-

• Class: Alkali-subgroup 2 < Alkali-tourmaline group < Tourmaline supergroup
• Class: Cyclosilicate (Single ring) - Borate - Fluoride - Hydroxide

• F => OH: Elbaite

• LiAl => Mg₂: Fluor-dravite
• LiAl => Fe₂: Fluor-schorl

• Color: Blue
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Habit: Prismatic

• System: Trigonal
• Group: 3m, R3m
• Lattice: a=15.9, c=7.1

Etymology: Elba island, Italy