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Thorium Oxide

Thorium, 90Th

Cas No. 7440-29-1
Appearance silvery, often with black tarnish
Atomic Number(Z) 90
Phase at STP solid
Melting point 2023 K (1750 °C, 3182 °F)
Boiling point 5061 K (4788 °C, 8650 °F)
Density (near r.t.) 11.7 g/cm3
Heat of fusion 13.81 kJ/mol
Heat of vaporisation 514 kJ/mol
Molar heat capacity 26.230 J/(mol·K)

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