Symbol
Gd
  
Pu
  
Period Number
6
  
7
  
Block
f block
  
f block
  
Element Family
Lanthanide
  
Actinide
  
Space Group Name
P63/mmc
  
P121/m1
  
Interesting Facts
- Gadolinium is not found free in nature, hence it is not a native metal.
- Gadolinium metal found in minerals like Monazite and Bastnaesite.
  
- Plutonium metal if obtain from ores of uranium metal.
- Plutonium metal is very sensitive to the change in atmospheric conditions like temperature and pressure.
  
Sources
Found in Minerals, Mining
  
Mining, Ores of metals
  
History
  
  
Who Discovered
Jean Charles Galissard de Marignac
  
Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan
  
Discovery
In 1880
  
In Between 1940 1941
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~0.0000002 %
  
25
~-9999 %
  
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Not Available
  
Abundance In Oceans
Not Available
  
Uses & Benefits
- Its alloys are also used in making Magnets, electronic components and Data storage devices.
- Compound of Gadolinium metal are used in magnetic resonance imaging (MRI).
  
- Plutonium was used in atomic bombs and still it is being used in various weapons and Ammunition industry.
-
It is also used in nuclear power plant as source of energy for space missions.
  
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry
  
Aerospace Industry, Ammunition Industry
  
Medical Uses
NA
  
NA
  
Other Uses
Alloys
  
Alloys
  
Biological Properties
  
  
Toxicity
Non Toxic
  
Toxic
  
Present in Human Body
No
  
No
  
In Blood
Not Available
  
0.00 Blood/mg dm-3
  
37
In Bone
Not Available
  
0.00 p.p.m.
  
36
Melting Point
1,311.00 °C
  
35
Boiling Point
3,233.00 °C
  
25
3,235.00 °C
  
24
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Silvery White
  
Luster
Metallic
  
NA
  
Hardness
  
  
Vickers Hardness
Not Available
  
Speed of Sound
2,680.00 m/s
  
34
2,260.00 m/s
  
99+
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Gd
  
Pu
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Allred Rochow Electronegativity
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
593.40 kJ/mol
  
99+
584.70 kJ/mol
  
99+
2nd Energy Level
1,170.00 kJ/mol
  
99+
1,128.00 kJ/mol
  
99+
3rd Energy Level
1,990.00 kJ/mol
  
99+
2,084.00 kJ/mol
  
99+
4th Energy Level
4,250.00 kJ/mol
  
30
3,338.00 kJ/mol
  
99+
Electrochemical Equivalent
1.96 g/amp-hr
  
32
2.28 g/amp-hr
  
22
Electron Work Function
Not Available
  
Other Chemical Properties
Corrosion, Flammable, Ionization, Radioactive Isotopes
  
Corrosion, Ionization, Radioactive Isotopes, Radioactivity
  
Electron Configuration
[Xe] 4f7 5d1 6s2
  
[Rn] 5f6 7s2
  
Crystal Structure
Hexagonal Close Packed (HCP)
  
Monoclinic (MON)
  
Crystal Lattice
HCP-Crystal-Structure-of-Gadolinium.jpg#100
  
MON-Crystal-Structure-of-Plutonium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
19.90 cm3/mol
  
20
12.32 cm3/mol
  
99+
Adjacent Atomic Numbers
  
  
Valence Electron Potential
46.10 (-eV)
  
34
64.90 (-eV)
  
21
Lattice Angles
π/2, π/2, 2 π/3
  
NA
  
Lattice C/A Ratio
Not Available
  
Density
  
  
Density At Room Temperature
7.90 g/cm3
  
99+
19.82 g/cm3
  
13
Density When Liquid (at m.p.)
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Bulk Modulus
Not Available
  
Other Mechanical Properties
Ductile, Malleable
  
Ductile, Malleable
  
Magnetic Characteristics
  
  
Magnetic Ordering
Ferromagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Poor Conductor
  
Electrical Conductivity
0.01 106/cm Ω
  
99+
0.01 106/cm Ω
  
99+
Electron Affinity
50.00 kJ/mol
  
21
Not Available
  
Specific Heat
0.23 J/(kg K)
  
27
0.13 J/(kg K)
  
39
Molar Heat Capacity
37.03 J/mol·K
  
2
35.50 J/mol·K
  
3
Thermal Conductivity
10.60 W/m·K
  
99+
6.74 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
9.40 µm/(m·K)
  
99+
46.70 µm/(m·K)
  
6
Enthalpy
  
  
Enthalpy of Vaporization
359.40 kJ/mol
  
21
344.00 kJ/mol
  
25
Enthalpy of Fusion
10.05 kJ/mol
  
36
2.82 kJ/mol
  
99+
Enthalpy of Atomization
352.00 kJ/mol
  
27
360.00 kJ/mol
  
26
Standard Molar Entropy
68.10 J/mol.K
  
16
Not Available