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Corkite

Year of discovery: 1869 (Glandore mine, Ireland), 1964 (Japan)

Locality list: 7 localities of corkite

• PbFe₃(PO₄)(SO₄)(OH)₆
• [Pb²⁺][Fe³⁺₃][(OH)₆|SO₄|PO₄]^11-

• Class: Beudantite group < Alunite supergroup
• Class: Phosphate - Sulfate - Hydroxide
• Soluble in: warm HCl

• Fe => Al: Hinsdalite (Series)

• SO₄ => HPO₄: Kintoreite (Series)

• PO₄ => AsO₄: Beudantite (Series)

• Pb_0.5PO₄ => SO₄: Plumbojarosite

• Color: Brown, Pale yellow
• Streak: Pale yellow
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {0001} (1 planes)
• Hardness: 3.5-4.5
• Density: 4.3

• System: Trigonal
• Group: (-3)m, R(-3)m
• Lattice: a=7.3, c=16.9