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Jennite

Year of discovery: 1966 (Crestmore quarries, USA), 1984 (Japan)

Locality list: 2 localities of jennite

• Ca₉Si₆O₁₈(OH)₁₀,8H₂O
• [Ca²⁺₉][(OH)₈|(HSi₃O₉)₂]^18-,8H₂O

• Class: Cuspidine group
• Class: Inosilicate (Single chain) - Hydroxide - Hydrate
• Fluorescence: Short UV excitation (White, Some cases)

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

• Cleavage: Distinct on {001} (1 planes)
• Hardness: 3.5
• Density: 2.3

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=10.6, b=7.3, c=10.8, α=99.7, β=97.7, γ=110.1