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Zippeite

Year of discovery: 1845 (Elias mine, Czech), 1961 (Japan)

Locality list: 5 localities of zippeite

• K₄(UO₂)₆(SO₄)₃(OH)₁₀,4H₂O
• [K⁺₄][(UO₂)²⁺₆][(OH)₁₀|(SO₄)₃]^16-,4H₂O

• Class: Zippeite group
• Class: Uranyl - Sulfate - Hydroxide - Hydrate
• Soluble in: HCl
• Fluorescence: UV excitation (Yellowish green)
• Radioactive: Very strong

• K => Na: Natrozippeite

• K₂ => Ni: Nickelzippeite
• K₂ => Zn: Zinczippeite
• K₂ => Co: Cobaltzippeite

• Color: Yellow, Pale yellow
• Streak: Pale yellow
• Luster: Silky
• Diaphaneity: Translucent

• Cleavage: Perfect on {010} (1 plane)
• Hardness: 2
• Density: 3.7

• System: Monoclinic
• Group: 2, C2
• Lattice: a=8.8, b=13.9, c=17.7, β=104.2