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Segnitite

Year of discovery: 1991 (Broken Hill South mine, Australia), 1997 (Japan)

Locality list: 7 localities of segnitite

• PbFe₃(AsO₄)(HAsO₄)(OH)₆
• [Pb²⁺][Fe³⁺₃][(OH)₆|HAsO₄|AsO₄]^11-

• Class: Dussertite group < Alunite supergroup
• Class: Arsenate - Hydroxide

• Fe => Al: Philipsbornite

• AsO₄ => PO₄: Kintoreite (Series)

• HAsO₄ => SO₄: Beudantite (Series)

• Color: Greenish brown, Yellowish brown
• Streak: Pale yellow
• Luster: Adamantine
• Diaphaneity: Transparent-Translucent

• Cleavage: Good on {0001} (1 plane)
• Hardness: 4
• Density: 4.2

• System: Trigonal
• Group: (-3)m, R(-3)m
• Lattice: a=7.4, c=17.1