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Rosenhahnite

Year of discovery: 1967 (Russian river, USA), 1982 (Japan)

Locality list: 3 localities of rosenhahnite

• Ca₃Si₃O₈(OH)₂
• HCa₃Si₃O₉(OH,CO₃)
• [H⁺][Ca²⁺₃][HSi₃O₁₀]^7-

• Class: Sorosilicate
• Fluorescence: UV excitation (Yellowish green-Pink)

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

• Cleavage: Perfect on {001} (1 plane), Good on {100} and {010} (2 planes)
• Hardness: 4.5-5
• Density: 2.9

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=7.0, b=9.5, c=6.8, α=108.6, β=94.8, γ=95.9