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As a magnesium alloy, a small quantity of thorium can be used for its. hardening and lightweight properties, making it ideal for the aerospace industry.1 One problem. with thorium is its mildly radioactive nature, producing concerns over its safety and potential. harmful effects.
Thorium is found in nature in the form of the oxide thorite, ThO2, which forms crystals as thorianite . It appears in the form of thorium phosphate in monazite sand. Thorium is found in the mineral aeschynite and euxenite. Thorium has been used in the manufacture of mantles for gas lanterns. The fabric of the mantles is saturated with thorium nitrate and cerium nitrate. The burning of the mantles leaves a residue of thorium and cerium dioxides.