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What is Lanthanum?

Lanthanum In Periodic Table

Lanthanum Symbol
La

Group Number
Not Available

Period Number
6
📊

Block
f block
📊

Element Family
Lanthanide
📊

CAS Number of Lanthanum
7439910
87

Space Group Name
P63/mmc

Space Group Number
194.00
5
📊

Facts about Lanthanum

Interesting Facts
  • Lanthanum metal is highly malleable, ductile and sectile.
  • If exposed to air Lanthanum metal oxidizes rapidly.

Sources
Found in Minerals, Mining, Ores of Minerals

History of Lanthanum

Who Discovered
Carl Gustaf Mosander

Discovery
In 1838

Abundance of Lanthanum

Abundance In Universe
0.00 %
22
📊

Abundance In Sun
0.00 %
26
📊

Abundance In Meteorites
0.00 %
32
📊

Abundance In Earth's Crust
0.00 %
19
📊

Abundance In Oceans
0.00 %
29
📊

Abundance In Humans
Not Available

Uses of Lanthanum

Uses & Benefits
  • 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
Electrical Industry, Electronic Industry

Medical Uses
NA

Other Uses
Alloys, Mirror Manufacturing

Biological Properties

Toxicity
Low Toxic
📊

Present in Human Body
📊

In Blood
Not Available

In Bone
0.08 p.p.m.
24

Physical Properties of Lanthanum

Lanthanum Melting Point
920.00 °C
49
📊

Lanthanum Boiling Point
3,469.00 °C
18
📊

Appearance of Lanthanum

Physical State
Solid
📊

Color
Silvery White

Luster
NA

Hardness of Lanthanum

Mohs Hardness
2.50
14
📊

Brinell Hardness
350.00 MPa
30
📊

Vickers Hardness
360.00 MPa
26
📊

Speed of Sound
2,475.00 m/s
37
📊

Optical Properties

Refractive Index
Not Available

Reflectivity
Not Available

Allotropes

α Allotropes
Not Available

β Allotropes
Not Available

γ Allotropes
Not Available

Chemical Properties of Lanthanum

Chemical Formula
La

Isotopes of Lanthanum

Known Isotopes
31
8
📊

Electronegativity

Pauling Electronegativity
1.10
44
📊

Sanderson Electronegativity
Not Available

Allred Rochow Electronegativity
1.08
31
📊

Mulliken-Jaffe Electronegativity
Not Available

Allen Electronegativity
Not Available

Electropositivity

Pauling Electropositivity
2.90
10
📊

Ionization Energies

1st Energy Level
538.10 kJ/mol
75
📊

2nd Energy Level
1,067.00 kJ/mol
76
📊

3rd Energy Level
1,850.30 kJ/mol
80
📊

4th Energy Level
4,819.00 kJ/mol
22
📊

5th Energy Level
5,940.00 kJ/mol
25
📊

6th Energy Level
Not Available

7th Energy level
Not Available

8th Energy Level
Not Available

9th Energy Level
Not Available

10th Energy Level
Not Available

11th Energy Level
Not Available

12th Energy Level
Not Available

13th Energy Level
Not Available

14th Energy Level
Not Available

15th Energy Level
Not Available

16th Energy Level
Not Available

17th Energy Level
Not Available

18th Energy Level
Not Available

19th Energy Level
Not Available

20th Energy Level
Not Available

21st Energy Level
Not Available

22nd Energy Level
Not Available

23rd Energy Level
Not Available

24th Energy Level
Not Available

25th Energy Level
Not Available

26th Energy Level
Not Available

27th Energy Level
Not Available

28th Energy Level
Not Available

29th Energy Level
Not Available

30th Energy Level
Not Available

Electrochemical Equivalent
1.73 g/amp-hr
42
📊

Electron Work Function
3.50 eV
31
📊

Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility

Atomic Properties of Lanthanum

Atomic Number of Lanthanum
57
59
📊

Lanthanum Electron Configuration
[Xe] 5d2 6s2

Crystal Structure
Double Hexagonal Close Packed (DHCP)
📊

Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100

Atom of Lanthanum

Number of Protons
57
58
📊

Number of Neutrons
82
42
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Number of Electrons
57
58
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Radius of an Atom

Atomic Radius
187.00 pm
8
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Covalent Radius
207.00 pm
6
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Van der Waals Radius
240.00 pm
13
📊

Atomic Weight
138.91 amu
53
📊

Atomic Volume
20.73 cm3/mol
16
📊

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential
40.71 (-eV)
46
📊

Lattice Constant
377.20 pm
28
📊

Lattice Angles
π/2, π/2, 2 π/3

Lattice C/A Ratio
1.62
2
📊

Mechanical Properties of Lanthanum

Lanthanum Density

Density At Room Temperature
6.16 g/cm3
65
📊

Density When Liquid (at m.p.)
5.94 g/cm3
44
📊

Tensile Strength
Not Available

Viscosity
Not Available

Vapor Pressure of Lanthanum

Vapor Pressure at 1000 K
Not Available

Vapor Pressure at 2000 K
0.98 (Pa)
15
📊

Elasticity properties

Shear Modulus
14.30 GPa
40
📊

Bulk Modulus
27.90 GPa
41
📊

Young's Modulus
36.60 GPa
42
📊

Poisson Ratio
0.28
17
📊

Other Mechanical Properties
Ductile

Magnetic Properties of Lanthanum

Magnetic Characteristics of Lanthanum

Specific Gravity
6.17
52
📊

Magnetic Ordering
Paramagnetic
📊

Permeability
Not Available

Susceptibility
Not Available

Electrical Properties

Electrical Property
Conductor
📊

Resistivity
615.00 nΩ·m
7
📊

Electrical Conductivity
0.01 106/cm Ω
51
📊

Electron Affinity
48.00 kJ/mol
23
📊

Thermal Properties of Lanthanum

Specific Heat
0.19 J/(kg K)
32
📊

Molar Heat Capacity
27.11 J/mol·K
21
📊

Thermal Conductivity
13.40 W/m·K
57
📊

Critical Temperature
Not Available

Thermal Expansion
12.10 µm/(m·K)
32
📊

Enthalpy of Lanthanum

Enthalpy of Vaporization
399.60 kJ/mol
17
📊

Enthalpy of Fusion
6.20 kJ/mol
49
📊

Enthalpy of Atomization
431.00 kJ/mol
16
📊

Standard Molar Entropy
56.90 J/mol.K
23
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