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Iimoriite-(Y)

Year of discovery: 1958 (Japan as the first occurence in the World)

Locality list: 2 localities of iimoriite-(Y)

• Y₂(SiO₄)(CO₃)
• [Y³⁺₂][CO₃|SiO₄]^6-

• Class: Nesosilicate - Carbonate
• Soluble in: HCl (Slightly)

• Color: Brown, Gray, Colorless
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Habit: Granular

• Cleavage: Distinct on {110} (1 plane)
• Hardness: 5.5-6
• Density: 4.5

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=6.6, b=6.7, c=6.5, α=116.4, β=92.3, γ=95.6

Etymology: Satoyasu Iimori (1885-1982) and his son Takeo Iimori (1912-1943), Japanese Geochemists