Symbol
Ds
  
La
  
Group Number
Not Available
  
Period Number
7
  
6
  
Block
d block
  
f block
  
Element Family
Probably Transition
  
Lanthanide
  
Space Group Name
Not Available
  
P63/mmc
  
Space Group Number
Not Available
  
Interesting Facts
Not Available
  
- Lanthanum metal is highly malleable, ductile and sectile.
- If exposed to air Lanthanum metal oxidizes rapidly.
  
Sources
Synthetically Produced
  
Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung
  
Carl Gustaf Mosander
  
Discovery
In 1994
  
In 1838
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
~0.0000002 %
  
25
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Not Available
  
Abundance In Oceans
Not Available
  
Uses & Benefits
- Currently known uses of Darmstadtium metal are limited to research purpose only. As only few atoms of this metal are produced.
  
- It has no commercial uses, but its alloys are in high demand. Lanthanum and Nickel alloy is used for the hydrogen gas storage.
- The best-known use for mischmetal alloy of Lanthanum is; as a ‘flints’ for cigarette lighters.
  
Industrial Uses
NA
  
Electrical Industry, Electronic Industry
  
Medical Uses
NA
  
NA
  
Other Uses
Research Purposes
  
Alloys, Mirror Manufacturing
  
Biological Properties
  
  
Toxicity
Unknown
  
Low Toxic
  
Present in Human Body
No
  
Yes
  
In Blood
0.00 Blood/mg dm-3
  
37
Not Available
  
In Bone
0.00 p.p.m.
  
36
0.08 p.p.m.
  
24
Melting Point
Not Available
  
Boiling Point
Not Available
  
3,469.00 °C
  
18
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Unknown
  
Silvery White
  
Luster
Unknown Luster
  
NA
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
Vickers Hardness
Not Available
  
Speed of Sound
5,090.00 m/s
  
9
2,475.00 m/s
  
37
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
Ds
  
La
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Not Available
  
Allred Rochow Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Not Available
  
Ionization Energies
  
  
1st Energy Level
955.20 kJ/mol
  
5
538.10 kJ/mol
  
99+
2nd Energy Level
1,891.10 kJ/mol
  
16
1,067.00 kJ/mol
  
99+
3rd Energy Level
3,029.60 kJ/mol
  
25
1,850.30 kJ/mol
  
99+
4th Energy Level
3,955.90 kJ/mol
  
40
4,819.00 kJ/mol
  
22
5th Energy Level
5,113.70 kJ/mol
  
33
5,940.00 kJ/mol
  
25
Electrochemical Equivalent
Not Available
  
1.73 g/amp-hr
  
99+
Electron Work Function
Not Available
  
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
  
Ionization, Radioactive Isotopes, Solubility
  
Electron Configuration
[Rn] 5f14 6d8 7s2
  
[Xe] 5d2 6s2
  
Crystal Structure
Body Centered Cubic (BCC)
  
Double Hexagonal Close Packed (DHCP)
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
DHCP-Crystal-Structure-of-Lanthanum.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Van der Waals Radius
Not Available
  
Atomic Weight
138.91 amu
  
99+
Atomic Volume
Not Available
  
20.73 cm3/mol
  
16
Adjacent Atomic Numbers
  
  
Valence Electron Potential
Not Available
  
40.71 (-eV)
  
99+
Lattice Constant
Not Available
  
Lattice Angles
NA
  
π/2, π/2, 2 π/3
  
Lattice C/A Ratio
Not Available
  
Density
  
  
Density At Room Temperature
Not Available
  
6.16 g/cm
3
  
99+
Density When Liquid (at m.p.)
Not Available
  
5.94 g/cm3
  
99+
Tensile Strength
Not Available
  
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
Unknown
  
Ductile
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Magnetic Ordering
Unknown
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Unknown
  
Conductor
  
Resistivity
Not Available
  
Electrical Conductivity
Not Available
  
0.01 10
6/cm Ω
  
99+
Electron Affinity
Not Available
  
48.00 kJ/mol
  
23
Specific Heat
Not Available
  
0.19 J/(kg K)
  
32
Molar Heat Capacity
Not Available
  
27.11 J/mol·K
  
21
Thermal Conductivity
Not Available
  
13.40 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
Not Available
  
12.10 µm/(m·K)
  
32
Enthalpy
  
  
Enthalpy of Vaporization
Not Available
  
399.60 kJ/mol
  
17
Enthalpy of Fusion
Not Available
  
6.20 kJ/mol
  
99+
Enthalpy of Atomization
Not Available
  
431.00 kJ/mol
  
16
Standard Molar Entropy
Not Available
  
56.90 J/mol.K
  
23