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Namuwite

Year of discovery: 1982 (Aberllyn mine, UK), 2003 (Japan)

Locality list: A locality of namuwite

• Zn₄SO₄(OH)₆,4H₂O
• (Zn,Cu)₄SO₄(OH)₆,4H₂O
• [Zn²⁺₄][(OH)₆|SO₄]^8-,4H₂O

• Class: Sulfate - Hydroxide - Hydrate
• Formed on dehydration of Osakaite under dry condition.
• Hydrate to Osakaite under humid condition.

• 4H₂O => 5H₂O: Osakaite

• Color: Bluish green
• Streak: Pale green
• Luster: Pearly
• Diaphaneity: Translucent

• Cleavage: Perfect on {0001} (1 plane)
• Hardness: 2
• Density: 2.8

• System: Trigonal
• Group: (-3), P(-3)
• Lattice: a=8.3, c=10.5