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Terbium, 65Tb
Atomic number (Z) 65
Phase at STP solid
Melting point 1629 K (1356 °C, 2473 °F)
Boiling point 3396 K (3123 °C, 5653 °F)
Density (near r.t.) 8.23 g/cm3
when liquid (at m.p.) 7.65 g/cm3
Heat of fusion 10.15 kJ/mol
Heat of vaporization 391 kJ/mol
Molar heat capacity 28.91 J/(mol·K)
  • Terbium(III,IV) Oxide

    Terbium(III,IV) Oxide

    Terbium(III,IV) Oxide, occasionally called tetraterbium heptaoxide, has the formula Tb4O7, is a highly insoluble thermally stable Terbium source.Tb4O7 is one of the main commercial terbium compounds, and the only such product containing at least some Tb(IV) (terbium in the +4 oxidation state), along with the more stable Tb(III). It is produced by heating the metal oxalate, and it is used in the preparation of other terbium compounds. Terbium forms three other major oxides: Tb2O3, TbO2, and Tb6O11.