[ Top ] [ Japanese ]

Ferro-edenite [abbr. Fed ]

Year of discovery: 1946 (Baie-des-Moutons complex, Canada), 1963 (Japan)

Locality list: 15 localities of ferro-edenite

• NaCa₂Fe₅AlSi₇O₂₂(OH)₂
• [Na⁺][Ca²⁺₂][Fe²⁺₅][(OH)₂|AlSi₇O₂₂]^15-

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

• Na => []: Ferro-ferri-hornblende

• Fe => Mg: Edenite (Series)

• Si => Al: Hastingsite

• Si₂ => Al₂: Ferro-ferri-sadanagaite

• NaFe => []Al: Ferro-hornblende

• NaSi => []Al: Ferro-actinolite

• CaFe => NaAl: Ferro-katophorite
• CaFe => []Fe: Ferro-ferri-barroisite

• CaAl => []Si: Ferro-ferri-winchite
• CaAl => NaSi: Ferro-richterite

• CaSi => NaAl: Ferro-ferri-taramite

• FeSi => AlAl: Ferro-pargasite

• Fe₂Si₂ => Al₄: Ferro-sadanagaite

• Color: Black, Dark green
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Habit: Acicular, Prismatic

• Cleavage: Distinct on {110} (2 planes, 120 degree)
• Hardness: 5-6
• Density: 3.1

• System: Monoclinic
• Group: 2/m, C2/m