[ Top ] [ Japanese ]

Aluminosugilite

Year of discovery: 2019 (Cerchiara mine, Italy), 2020 (Japan)

Locality list: A locality of aluminosugilite

• KNa₂Li₃Al₂Si₁₂O₃₀
• [K⁺][Na⁺₂][Li⁺₃][Al³⁺₂][(Si₂O₅)₆]^12-

• Class: Milarite group
• Class: Cyclosilicate (Double ring)
• Radioactive: Very weak

• NaAl => []Sn: Brannockite
• NaAl => []Ti: Berezanskite
• NaAl => []Zr: Sogdianite

• Al => Fe: Sugilite

• Fe₂Li₃ => B₃: Poudretteite

• Color: Reddish purple
• Streak: Pale purple-White
• Luster: Vitreous
• Diaphaneity: Transparent-Tranlucent

• Cleavage: Indistinct on {0001} (1 plane)
• Hardness: 6-6.5
• Density: 2.7

• System: Hexagonal
• Group: 6/mmm, P/mcc
• Lattice: a=9.98, c=14.0

Etymology: Ken-ichi Sugi (1901-1948), Japanese petrogist