64 Gd 157.25
Gadolinium
Lanthanide
Gadolinium (Gd) is a chemical element with atomic number 64, classified as a lanthanide. At room temperature it is a solid. It was discovered in 1880 by Jean Charles Galissard de Marignac.
Properties
- Atomic number
- 64
- Atomic mass
- 157.25 u
- Category
- Lanthanide
- Group
- 0
- Period
- 6
- Block
- f-block
- Electron configuration
- [Xe] 4f⁷ 5d¹ 6s²
- Phase at STP
- Solid
- Density
- 7.895 g/cm³
- Melting point
- 1585 K (1311.8 °C)
- Boiling point
- 3546 K (3272.8 °C)
- Electronegativity
- 1.2
- Atomic radius
- 233 pm
- Ionization energy
- 6.15 eV
- Discovery
- 1880 · Jean Charles Galissard de Marignac
Common uses
MRI contrast agents, neutron capture, magnets, reactors
Did you know?
Essential for MRI scans and has unique magnetic properties.