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Caysichite-(Y)

Year of discovery: 1974 (Evans-Lou mine, Canada), 2004 (Japan)

Locality list: A locality of Caysichite-(Y)

• Ca₂Y₂Si₄O₁₀(CO₃)₃,4H₂O
• (Ca,Gd)₂Y₂Si₄O₁₀(CO₃)₃,4H₂O
• [Ca²⁺₂][Y³⁺₂][(CO₃)₃|(Si₂O₅)₂]^10-,4H₂O

• Class: Inosilicate - Carbonate - Hydrate
• Fluorescence: Cathodo luminescence
• Radioactive: Moderate

• Color: Colorless, Green, Yellow
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Indistinct on {010} (1 plane)
• Hardness: 4.5
• Density: 3.0

• System: Orthorhombic
• Group: mm2, Ccm2₁
• Lattice: a=13.3, b=14.0, c=9.7