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Agardite-(Y) (Photo)

Year of discovery: 1969 (Bou Skour mine, Morocco), 1985 (Japan)

Locality list: 6 localities of agardite-(Y)

• YCu₆(AsO₄)₃(OH)₆,3H₂O
• (Y,Ca)Cu₆(AsO₄,HAsO₄)₃(OH)₆,3H₂O
• [Y³⁺][Cu²⁺₆][(OH)₆|(AsO₄)₃]^15-,3H₂O

• Class: Agardite series < Mixite group
• Class: Arsenate - Hydroxide - Hydrate

• Y => Bi: Mixite
• Y => La: Agardite-(La) (Series)
• Y => Nd: Agardite-(Nd) (Series)
• Y => Ce: Agardite-(Ce) (Series)
• Y => Al: Goudeyite

• Y => CaH: Zálesíite (Zalesiite)
• Y => PbH: Plumboagardite

• AsO₄ => PO₄: Petersite-(Y)

• Color: Bluish green-Yellowish green
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Translucent

• Habit: Acicular
• Aggregate: Mossy

• Cleavage: No
• Hardness: 3
• Density: 3.7

• System: Hexagonal
• Group: 6/m, P6₃/m
• Lattice: a=13.6, c=5.9