Symbol
Cf
  
V
  
Group Number
Not Available
  
Period Number
7
  
4
  
Block
f block
  
d block
  
Element Family
Actinide
  
Transition Metal
  
Space Group Name
P63/mmc
  
Im_ 3m
  
Interesting Facts
- Californium metal is very harmful and highly radioactive.
- Californium metal is the heaviest metal.
  
- Vanadium is a highly reactive metal, hence it is not found free in nature.
- Vanadium can be found in almost 65 different types of minerals.
  
Sources
Made by Bombarding Curium with Helium Ions
  
Found As a By-product, Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory
  
Andrés Manuel del Río
  
Discovery
In 1950
  
In 1801
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Not Available
  
Abundance In Oceans
Not Available
  
Abundance In Humans
Not Available
  
Uses & Benefits
- Californium metal has a very strong neutron emitter. It is used as a metal detector.
-
It also used as an identifier to check Water and oil layers in oil wells.
  
- Its ally with steel is used very tough and hence it is used in armor plates, axles, piston rods, tools and crankshafts.
-
Its oxide is used as pigments for glass and ceramics.
  
Industrial Uses
Chemical Industry
  
Aerospace Industry, Automobile Industry, Chemical Industry
  
Medical Uses
NA
  
NA
  
Other Uses
Alloys, Nuclear Research
  
Alloys
  
Biological Properties
  
  
Toxicity
Toxic
  
Toxic
  
Present in Human Body
No
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
37
0.00 Blood/mg dm-3
  
36
In Bone
0.00 p.p.m.
  
36
0.00 p.p.m.
  
31
Melting Point
1,890.00 °C
  
13
Boiling Point
1,470.00 °C
  
99+
3,380.00 °C
  
20
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silver
  
Blue-Silver Grey
  
Luster
NA
  
Metallic
  
Hardness
  
  
Brinell Hardness
Not Available
  
Vickers Hardness
Not Available
  
Speed of Sound
Not Available
  
4,560.00 m/s
  
17
Optical Properties
  
  
Reflectivity
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Cf
  
V
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
608.00 kJ/mol
  
99+
650.90 kJ/mol
  
99+
2nd Energy Level
1,206.00 kJ/mol
  
99+
1,414.00 kJ/mol
  
99+
3rd Energy Level
2,267.00 kJ/mol
  
99+
2,830.00 kJ/mol
  
35
4th Energy Level
3,599.00 kJ/mol
  
99+
4,507.00 kJ/mol
  
25
5th Energy Level
Not Available
  
6,298.70 kJ/mol
  
23
6th Energy Level
Not Available
  
12,363.00 kJ/mol
  
5
7th Energy level
Not Available
  
14,530.00 kJ/mol
  
5
8th Energy Level
Not Available
  
16,730.00 kJ/mol
  
7
9th Energy Level
Not Available
  
19,860.00 kJ/mol
  
7
10th Energy Level
Not Available
  
22,240.00 kJ/mol
  
12
11th Energy Level
Not Available
  
24,670.00 kJ/mol
  
15
12th Energy Level
Not Available
  
29,730.00 kJ/mol
  
12
13th Energy Level
Not Available
  
32,446.00 kJ/mol
  
12
14th Energy Level
Not Available
  
86,450.00 kJ/mol
  
1
15th Energy Level
Not Available
  
94,170.00 kJ/mol
  
2
16th Energy Level
Not Available
  
102,300.00 kJ/mol
  
3
17th Energy Level
Not Available
  
112,700.00 kJ/mol
  
4
18th Energy Level
Not Available
  
121,600.00 kJ/mol
  
5
19th Energy Level
Not Available
  
130,700.00 kJ/mol
  
6
20th Energy Level
Not Available
  
143,400.00 kJ/mol
  
8
21st Energy Level
Not Available
  
151,440.00 kJ/mol
  
8
Electrochemical Equivalent
3.12 g/amp-hr
  
15
0.38 g/amp-hr
  
99+
Electron Work Function
Not Available
  
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
  
Anti Corrosion, Ionization, Radioactive Isotopes
  
Electron Configuration
[Rn] 5f10 7s2
  
[Ar] 3d3 4s2
  
Crystal Structure
Double Hexagonal Close Packed (DHCP)
  
Body Centered Cubic (BCC)
  
Crystal Lattice
DHCP-Crystal-Structure-of-Californium.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Covalent Radius
Not Available
  
Van der Waals Radius
Not Available
  
Atomic Volume
Not Available
  
8.78 cm3/mol
  
99+
Adjacent Atomic Numbers
  
  
Valence Electron Potential
44.50 (-eV)
  
38
120.00 (-eV)
  
6
Lattice Angles
π/2, π/2, 2 π/3
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Density
  
  
Density At Room Temperature
15.10 g/cm3
  
21
6.00 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
5.50 g/cm3
  
99+
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
Malleable, Sectile
  
Ductile, Malleable
  
Magnetic Characteristics
  
  
Magnetic Ordering
Paramagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Unknown
  
Superconductor
  
Resistivity
Not Available
  
197.00 nΩ·m
  
19
Electrical Conductivity
Not Available
  
0.05 10
6/cm Ω
  
35
Electron Affinity
Not Available
  
50.60 kJ/mol
  
20
Specific Heat
Not Available
  
0.49 J/(kg K)
  
10
Molar Heat Capacity
Not Available
  
24.89 J/mol·K
  
99+
Thermal Conductivity
Not Available
  
30.70 W/m·K
  
39
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
Not Available
  
8.40 µm/(m·K)
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
458.60 kJ/mol
  
14
Enthalpy of Fusion
Not Available
  
17.57 kJ/mol
  
14
Enthalpy of Atomization
Not Available
  
514.60 kJ/mol
  
13
Standard Molar Entropy
Not Available
  
28.90 J/mol.K
  
99+