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Munakataite

Year of discovery: 2007 (Japan as the first occurence in the World)

Locality list: 3 localities of munakataite

• Pb₂Cu₂(SeO₃)(SO₄)(OH)₄
• Pb₂(Cu,Ca)₂(SeO₃)(SO₄)(OH)₄
• [Pb²⁺₂][Cu²⁺₂][(OH)₄|Se⁴⁺O₃|SO₄]^8-

• Class: Selenate - Sulfate - Hydroxide

• SeO₃ => SO₄: Linarite

• SO₄ => Se⁶⁺O₄: Schmiederite

• Color: Pale blue
• Streak: Bluish white
• Luster: Vitreous
• Diaphaneity: Transparent

• Habit: Acicular
• Aggregate: Radial

• Cleavage: Perfect (1 plane, parallel to b-axis)
• Hardness: less than 2
• Density: 5.5

• System: Monoclinic
• Group: 2/m, P2₁/m
• Lattice: a=9.8, b=5.7, c=9.3, β=102.4

Etymology: Munakata city in Fukuoka prefecture, Japan, the adress of Kato mine where this mineral was discovered for the first time.