Thorium Dioxide

Name:
Thorium Dioxide
Detailed information:

Chemistry name:	thorium anhydride; thorium oxide; thoria
M Formula:	ThO2
Properties:
Heavy white powder. D 9.7, mp 3300C (highest of all oxides), bp 4400C, Mohs hardness 6.5, very refractory. Soluble in sulfuric acid; insoluble in water.
Derivation:
Reduction of thorium nitrate.
Grade:
Technical and purities to 99.8% ThO2; granular particles; crystals.
Use:
Ceramics (high temperature), gas mantles, nuclear fuel, flame spraying, crucibles, medicine, nonsilica optical glass, catalyst, thoriated tungsten filaments.