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Becquerelite

Year of discovery: 1922 (Shinkolobwe mine (Kasolo mine), Congo (Zaïre)), 1969 (Japan)

Locality list: A locality of becquerelite

• Ca(UO₂)₆O₄(OH)₆,8H₂O
• [Ca²⁺][(UO₂)²⁺₆][(OH)₆|O₄]^14-,8H₂O

• Class: Uranyl - Oxide - Hydroxide - Hydrate
• Radioactive: Very strong

• Ca => K₂: Compreignacite
• Ca => Ba: Billietite

• Color: Brownish yellow-Yellow
• Streak: Yellow
• Luster: Adamantine
• Diaphaneity: Transparent

• Cleavage: Perfect on {001} (1 plane), Imperfect on {110}{010}{101} (5 planes)
• Hardness: 2.5
• Density: 5.1

• System: Orthorhombic
• Group: mm2, Pna2₁
• Lattice: a=13.8, b=12.4, c=14.9