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Ferri-leakeite

Year of discovery: 1992 (Kajlidongri mine, India), 2025 (Japan)

Locality list: A locality of ferri-leakeite

• Na₃Mg₂Fe₂LiSi₈O₂₂(OH)₂
• [Na⁺][Na⁺₂][Mg²⁺₂][Fe³⁺₂][Li⁺][(OH)₂|(Si₄O₁₁)₂]^14-

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

• Na => K: Potassic-ferri-leakeite

• Color: Dark red
• Streak: Pale pink
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Perfect on {110} (2 planes, 120 degree)
• Hardness: 5.5-6
• Density: 3.1

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=9.8, b=17.8, c=5.3, β=104.4