[ Top ] [ Japanese ]

Ferrarisite

Year of discovery: 1980 (Gabe Gottes mine, France), 2010 (Japan)

Locality list: A locality of ferrarisite

• Ca₅(AsO₄)₂(HAsO₄)₂,9H₂O
• [Ca²⁺₅][(HAsO₄)₂|(AsO₄)₂]^10-,9H₂O

• Class: Arsenate - Hydrate
• Soluble in: HCl
• Dehydrate to Ca₅(AsO₄)₂(HAsO₄)₂,2.5H₂O under dry condition.

• Polymorph: Guérinite (Guerinite) (Monoclinic)

• Color: Colorless, White
• Streak: White
• Luster: Silky
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {001} (1 plane)
• Density: 2.6

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=8.3, b=6.7, c=11.2, α=106.2, β=92.9, γ=99.2