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Kidwellite

Year of discovery: 1978 (Fodderstack mountain, USA), 1980 (Japan)

Locality list: A locality of kidwellite

• NaFe₉(PO₄)₆(OH)₁₁,3H₂O
• Na(Fe,Cu)_9+x(PO₄)₆(OH)₁₁,3H₂O
• [Na⁺][Fe³⁺₉][Cu⁺][(OH)₁₁|(PO₄)₆]^29-,3H₂O

• Class: Phosphate - Hydroxide - Hydrate

• Color: Yellowish green, Grayish green
• Streak: Yellow
• Luster: Resinous
• Diaphaneity: Translucent

• Cleavage: Perfect on {100} (1 plane)
• Hardness: 3
• Density: 3.0

• System: Monoclinic
• Group: 2/m, P2/c
• Lattice: a=20.6, b=5.2, c=13.8, β=112.6