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Ferri-ghoseite

Year of discovery: 2003 (Tirodi mine, India), 2018 (Japan)

Locality list: A locality of ferri-ghoseite

• NaMnMg₄FeSi₈O₂₂(OH)₂
• [][Mn²⁺][Na][Mg²⁺₄][Fe³⁺][(OH)₂|(Si₄O₁₁)₂]^14-

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

• Mn => Ca: Ferri-winchite

• Color: Yellowish brown, Orange
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent, Translucent

• Cleavage: Perfect on {010} (1 plane)
• Hardness: 6.5

• System: Monoclinic
• Group: 2/m
• Lattice: a=9.7, b=18.0, c=5.3, β=103.5