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Meurigite-K

Year of discovery: 1995 (Chino mine, USA), 2021 (Japan)

Locality list: A locality of meurigite-K

• KFe₈(PO₄)₆(OH)₇,6.5H₂O
• [K⁺(H₂O)_2.5][Fe³⁺₈][(OH)₇|(PO₄)₆]^25-,4H₂O

• Class: Phosphate - Hydroxide - Hydrate

• K => Na: Meurigite-Na

• K(H₂O)_2.5 => (K,H₂O)_3.5: Phosphofibrite

• Color: Yellowish brown, Pale brown, Yellow, White
• Streak: White
• Luster: Sub-vitreous, Waxy, Silky
• Diaphaneity: Translucent

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 3
• Density: 3.0

• System: Monoclinic
• Group: 2/m, B2/b
• Lattice: a=29.0, b=5.2, c=19.7, β=107.0