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Uraninite [abbr. Urn ]
Year of discovery: 1845 (Jáchymov, Czech), 1931 (Japan)
Locality list: 91 localities of uraninite
- Class: Oxide
- Variety: Cleveite (+REE)
- Variety: Bröggerite (Broggerite) (+Th)
- Variety: Pitchblende (Massive)
- Insoluble in: HCl
- Radioactive: Very strong
- Alter to Schoepite.
- U => Ge: Argutite
- U => Mn: Pyrolusite (β), Ramsdellite (γ), Akhtenskite (ε)
- U => Ti: Rutile, Anatase, Brookite
- U => Pb: Scrutinyite (α), Plattnerite
- U => Sn: Cassiterite
- U => Si: Quartz (α), β-Quartz (β), Tridymite, Cristobalite, Coesite, Stishovite, Mogánite (Moganite)
- U => V: Paramontroseite
- U => Mo: Tugarinovite
- U => Th: Thorianite (Series)
- U => Ce: Cerianite-(Ce)
- U => Se: Downeyite
- U => Zr: Baddeleyite
- U => Te: Tellurite, Paratellurite
- Color: Black, Brownish black
- Streak: Brownish black
- Luster: Greasy
- Diaphaneity: Opaque
- Habit: Cubic, Octahedral, Dodecahedral
- Cleavage: Good
- Hardness: 5-6
- Density: 10.9
- System: Cubic
- Group: m3m, Fm3m
- Lattice: a=5.5