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Hinsdalite

Year of discovery: 1911 (Golden Fleece mine, USA), 1997 (Japan)

Locality list: 3 localities of hinsdalite

• PbAl₃(SO₄)(PO₄)(OH)₆
• (Pb,Sr)Al₃(SO₄)(PO₄)(OH)₆
• [Pb²⁺][Al³⁺₃][(OH)₆|SO₄|PO₄]^11-

• Class: Beudantite group < Alunite supergroup
• Class: Phosphate - Sulfate - Hydroxide
• Insoluble in: HCl, HNO₃, H₂SO₄

• Pb => Sr: Svanbergite
• Pb => Ca: Woodhouseite

• Al => Fe: Corkite (Series)

• SO₄ => HPO₄: Plumbogummite

• PO₄ => AsO₄: Hidalgoite

• (SO₄)(PO₄) => (HAsO₄)(AsO₄): Philipsbornite
• (SO₄)(PO₄) => (PO₄,SO₄)?: Orpheite

• Color: Colorless, Pale green
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 4.5
• Density: 3.7

• System: Trigonal
• Group: (-3)m, R(-3)m
• Lattice: a=7.0, c=16.8