Thorium was a material used as an explosive, and would burn longer than baradium. However, it was rather hard to find. Thorium decayed, and this decay, when occurring within a planet, heated the rock of the planet's crust.
- Star Wars: Knights of the Old Republic II: The Sith Lords
- (Mentioned only)
- Dark Forces: Soldier for the Empire (Mentioned only)
- Thorium on Wikipedia