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Kinoshitalite

Year of discovery: 1973 (Japan as the first occurence in the World)

Locality list: 3 localities of kinoshitalite

• BaMg₃Al₂Si₂O₁₀(OH)₂
• (Ba,K)(Mg,Mn,Al)₃Al₂Si₂O₁₀(OH)₂
• [Ba²⁺][Mg²⁺₃][(OH)₂|Al₂Si₂O₁₀]^8-

• Class: Trioctahedral < Brittle mica group < Mica supergroup
• Class: Phyllo-Aluminosilicate - Hydroxide
• Radioactive: Very weak

• Mg => Fe: Ferrokinoshitalite

• OH => F: Fluorokinoshitalite

• BaAl => KSi: Phlogopite

• Mg(OH)₂ => TiO₂: Oxykinoshitalite

• Color: Yellowish brown, Colorless
• Streak: Pale yellow
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 2.5-3
• Density: 3.3

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=5.3, b=9.3, c=10.3, β=100.0

Etymology: Professor Kameki Kinoshita (1896-1974), Japanese economic geologist