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Diadochite

Year of discovery: 1837 (Arnsbach, Germany), 1999 (Japan)

Locality list: A locality of diadochite

• Fe₂(PO₄)(SO₄)(OH),6H₂O
• [Fe³⁺₂][OH|SO₄|PO₄]^6-,6H₂O

• Class: Phosphate - Sulfate - Hydroxide - Hydrate
• Soluble in: HCl, HNO₃, H₂SO₄

• Polymorph: Destinezite (Triclinic)

• Color: Yellow-Reddish brown
• Streak: Yellow
• Luster: Waxy
• Diaphaneity: Transparent-Opaque

• Cleavage: No
• Hardness: 3-4
• Density: 2.2

• System: Amorphous, Triclinic
• Group: (-1), P(-1)
• Lattice: a=9.6, b=9.7, c=7.3, α=98.7, β=107.9, γ=63.9