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Thorianite

Year of discovery: 1904 (Balangoda, Sri Lanka), 2009 (Japan)

Locality list: A locality of thorianite

• ThO₂
• [Th⁴⁺][O₂]^4-

• Class: Oxide
• Radioactive: Very strong

• Th => Ge: Argutite
• Th => Mn: Pyrolusite (β), Ramsdellite (γ), Akhtenskite (ε)
• Th => Ti: Rutile, Anatase, Brookite
• Th => Pb: Scrutinyite (α), Plattnerite
• Th => Sn: Cassiterite
• Th => Si: Quartz (α), β-Quartz (β), Tridymite, Cristobalite, Coesite, Stishovite, Mogánite (Moganite)
• Th => V: Paramontroseite
• Th => U: Uraninite (Series)
• Th => Zr: Baddeleyite
• Th => Ce: Cerianite-(Ce)
• Th => Se: Downeyite
• Th => Mo: Tugarinovite
• Th => Te: Tellurite, Paratellurite

• Color: Dark gray, Brownish black
• Streak: Greenish gray
• Luster: Resinous
• Diaphaneity: Opaque

• Cleavage: Indistinct on {001} (3 planes)
• Hardness: 6.5-7
• Density: 9.7

• System: Cubic
• Group: m3m, Fm3m
• Lattice: a=5.6