Gadolinium, Gd
Index
Gadolinium is a rare earth metal with atomic number 64, an atomic weight of 157.25, and a density of 7.89 Mg/m3. Its melting point is 1312 C, and it boils at 3000 C.

The electronic configuration of Gadolinium is: 
(Xe)(4f 7)(5d1)(6s2).     Its atomic radius is 0.179 nm.

At room temperature Gadolinium has a hexagonal close packed crystal structure with a = 0.362 nm and 
c = 575nm.