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Katoite

Year of discovery: 1982 (Campomorto querry, Italy), 2020 (Japan)

Locality list: A locality of katoite

• Ca₃Al₂(OH)₁₂
• Ca₃Al₂([],SiO₄)₃(OH,O)₁₂
• [Ca²⁺₃][Al³⁺₂][ []₃ ][(OH)₁₂]^12-

• Class: Garnet supergroup
• Class: Hydroxide

• (OH)₄ => SiO₄: Grossular (Series)

• (OH)₈ => (SiO₄)₂: Holtstamite

• Color: Colorless
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: No
• Hardness: 5-6
• Density: 2.8

• System: Cubic
• Group: m3m, Ia3d
• Lattice: a=12.4

Etymology: Dr. Akira Kato (1931-), Japanese mineralogist of the National Museum of Nature and Science in Tokyo, Japan