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Petersite-(Y)

Year of discovery: 1981 (Laurel Hill (Snake Hill), USA), 1986 (Japan)

Locality list: A locality of petersite-(Y)

• YCu₆(PO₄)₃(OH)₆,3H₂O
• (Y,Ce,Nd,Ca)Cu₆(PO₄)₃(OH)₆,3H₂O
• [Y³⁺][Cu²⁺₆][(OH)₆|(PO₄)₃]^15-,3H₂O

• Class: Mixite group
• Class: Phosphate - Hydroxide
• Radioactive: Moderate

• Y => CaH: Calciopetersite
• Y => La: Petersite-(La)

• PO₄ => AsO₄: Agardite-(Y)

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

• Cleavage: No
• Hardness: 3-4
• Density: 3.4

• System: Hexagonal
• Group: 6/m, P6₃/m
• Lattice: a=13.3, c=5.9