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Gormanite

Year of discovery: 1981 (Big Fish river, Canada, and Rapid Creek, Canada), 2015 (Japan)

Locality list: A locality of gormanite

• Fe₃Al₄(PO₄)₄(OH)₆,2H₂O
• (Fe²⁺,Mg)₃(Al,Fe³⁺)₄(PO₄)₄(OH)₆,2H₂O
• [Fe²⁺₃][Al³⁺₄][(OH)₆|(PO₄)₄]^18-,2H₂O

• Class: Phosphate - Hydroxide - Hydrate

• Fe => Mg: Souzalite

• Color: Bluish green, Dark green
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Indistinct on {001} (1 plane)
• Hardness: 4-5
• Density: 3.1

• System: Triclinic
• Group: 1, P1, P(-1)
• Lattice: a=11.8, b=5.1, c=13.6, &alpha:=90.5, β=99.2, γ=90.1