Atomic Number 64      Atomic Mass 157.25      Density 7.9004 g/mL

State solid      Color silvery white     

Melting Point 1313°C      Boiling Point 3266°C

Natural Isotopes Gd-152 0.20%   Gd-154 2.18%   Gd-155 14.80%   Gd-156 20.47%  
                                     Gd-157 15.65%   Gd-158 24.84%   Gd-160 21.86%

Abbreviated Electron Configuration [Xe] 4f⁷ 5d¹ 6s²

Discovered by Jean de Marignac in 1886.