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Leadhillite

Year of discovery: 1845 (Susanna mine, UK), 2024 (Japan)

Locality list: A localitie of susannite

• Pb₄(SO₄)(CO₃)₂(OH)₂
• [Pb²⁺₄][(OH)₂|(CO₃)₂|SO₄]^8-

• Class: Sulfate - Carbonate - Hydroxide
• Phase transition: Transit from Leadhillite by heating above 50 degree.

• Polymorph: Macphersonite (Orthorhombic), Leadhillite (Monoclinic, Low temperature)

• Color: Colorless, White
• Streak: White
• Luster: Adamantine
• Diaphaneity: Transparent-Translucent

• Habit: Hexagonal platy

• Hardness: 2.5-3

• System: Trigonal
• Group: 3, P3
• Lattice: a=9.1, c=11.6