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Okenite (Photo)

Year of discovery: 1828 (Qutdlingssat, Greenland), 1982 (Japan)

Locality list: 3 localities of okenite

• CaSi₂O₅,2H₂O
• [Ca²⁺][Si₂O₅]^2-,2H₂O

• Class: Phyllosilicate - Hydrate
• Physical: Elastic

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

• Habit: Acicular
• Aggregate: Radial

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 4.5-5
• Density: 2.3

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=9.7, b=7.3, c=22.0, α=92.7, β=100.1, γ=110.9