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Killalaite

Year of discovery: 1974 (Inishcrone, Ireland), 1984 (Japan)

Locality list: A locality of killalaite

• Ca₃Si₂O₇,0.5H₂O
• [Ca²⁺₃][Si₂O₇]^6-,0.5H₂O

• Class: Tilleyite group
• Class: Sorosilicate - Hydrate

• Color: Colorless, White
• Streak: White

• Cleavage: Perfect on {100} (1 plane), Good on {010} and {001}
• Density: 2.9

• System: Monoclinic
• Group: 2/m, P2₁/m
• Lattice: a=6.8, b=15.5, c=6.8, β=97.8