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Carnotite

Year of discovery: 1899 (Rajah mine, USA), 1962 (Japan)

Locality list: 2 localities of carnotite

• K₂(UO₂)₂(VO₄)₂,3H₂O
• [K⁺₂][(UO₂)²⁺₂][(VO₄)₂]^6-,3H₂O

• Class: Uranyl - Vanadate - Hydrate - Zeolitic water
• Soluble in: HCl, HNO₃, H₂SO₄
• Radioactive: Very strong
• Dehydrate under dry condition.

• K₂ => Ca: Tyuyamunite

• Color: Yellow
• Streak: Pale yellow
• Luster: Pearly
• Diaphaneity: Translucent

• Habit: Fine crystal
• Aggregate: Earthy

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 2
• Density: 4.7

• System: Monoclinic
• Group: 2/m, P2₁/a
• Lattice: a=10.5, b=8.4, c=6.9, β=103.8