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Uranophane

Year of discovery: 1853 (Miedzianka (Kupferberg), Poland), 1957 (Japan)

Locality list: 19 localities of uranophane

• Ca(UO₂)₂Si₂O₆(OH)₂,5H₂O
• [Ca²⁺][(UO₂)²⁺₂][(HSiO₄)₂]^6-,5H₂O

• Class: Uranophane group
• Class: Uranyl - Nesosilicate - Hydrate
• Soluble in: HCl (Gel residue)
• Fluorescence: UV excitation (Yellowish green, Crystals)
• Radioactive: Very strong

• Polymorph: β-Uranophane (Monoclinic)

• Ca => Cu: Cuprosklodowskite
• Ca => Co: Oursinite
• Ca => Mg: Sklodowskite

• Color: Pale yellow, Yellow
• Streak: Yellow
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {100} (1 plane)
• Hardness: 2-3
• Density: 3.9

• System: Monoclinic
• Group: 2, P2₁
• Lattice: a=15.9, b=7.0, c=6.6, β=97.5