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Fluoro-edenite

Year of discovery: 2000 (Monte Calvario, Italy), 1992 (Japan)

Locality list: A locality of fluoroedenite

• NaCa₂Mg₅AlSi₇O₂₂F₂
• NaCa₂Mg₅AlSi₇O₂₂(F,OH)₂
• [Na⁺][Ca²⁺₂][Mg²⁺₅][F₂|AlSi₇O₂₂]^15-

• Class: Ca amphibole subgroup < w(OH,F,Cl)-dominant amphibole group < Amphibole supergroup
• Class: Ino-Aluminosilicate (Double chain) - Fluoride
• Radioactive: Very weak

• F => OH: Edenite

• Color: Pale green, Pale yellow
• Streak: Pale yellow
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Perfect on {110} (2 planes, 120 degree)
• Hardness: 5-6

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=9.8, b=18.0, c=5.3, β=104.8