[ Top ] [ Japanese ]

Wallkilldellite-(Fe)

Year of discovery: 1997 (Roua mine, France), 2015 (Japan)

Locality list: A locality of wallkilldellite-(Fe)

• Ca₄Fe₆(AsO₄)₄(OH)₈,18H₂O
• (Ca,Cu)₂Fe₃(AsO₄,SiO₄)₂(OH,O)₄,9H₂O
• [Ca²⁺₄][Fe²⁺₆][(OH)₈|(AsO₄)₄]^20-,18H₂O

• Class: Wallkilldellite series
• Class: Arsenate - Hydroxide - Hydrate

• Fe => Mn Fe: Wallkilldellite

• Color: Yellowish brown
• Streak: Pale brown
• Luster: Vitreous-Resinous
• Diaphaneity: Translucent

• Cleavage: Perfect on {0001} (1 plane)
• Hardness: 2-3
• Density: 3

• System: Hexagonal
• Group: 6/mmm, P6/mmc
• Lattice: a=6.5, c=23.2