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Hedyphane

• Pb₃Ca₂(AsO₄)₃Cl
• [Pb²⁺₃][Ca²⁺₂][Cl|(AsO₄)₃]^10-

• Class: Hedyphane group < Apatite supergroup
• Class: Arsenate - Chloride
• Soluble in: HNO₃
• Fluorescence: UV excitation (Pale yellow, Weak)

• Pb => Ca: Turneaureite
• Pb => Ba: Morelandite

• Ca => Pb: Mimetite (Series)

• AsO₄ => PO₄: Phosphohedyphane

• Color: White, Pale blue, Pale brown
• Streak: White
• Luster: Resinous
• Diaphaneity: Translucent

• Cleavage: Imperfect on {1011} (3 planes)
• Hardness: 4-5
• Density: 5.8

• System: Hexagonal
• Group: 6/mmm, P6₃/mmc
• Lattice: a=10.1, c=7.2