Iron Oxide - Oxide/hydroxides

Oxide/hydroxides

• goethite (α-FeOOH),
• akaganéite (β-FeOOH),
• lepidocrocite (γ-FeOOH),
• feroxyhyte (δ-FeOOH),
• ferrihydrite (Fe₅HO₈·4H₂O approx.), or 5Fe₂O₃•9H₂O, better recast as FeOOH•0.4H₂O

• high-pressure FeOOH
• schwertmannite (ideally Fe₈O₈(OH)₆(SO)·nH₂O or Fe3+₁₆O₁₆(OH,SO₄)_12-13·10-12H₂O)
• green rust (FeIII_xFeII_y(OH)_3x+2y-z(A-)_z; where A- is Cl- or 0.5SO₄2-)