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What is Lanthanum?

All Metals

Nihonium
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Tennessine
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Lanthanum In Periodic Table

Symbol
La

Group Number
Not Available
📊

Period Number
6
📊

Block
f block
📊

Element Family
Lanthanide
📊

CAS Number
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 %
📊

Abundance In Sun
0.00 %
📊

Abundance In Meteorites
0.00 %
📊

Abundance In Earth's Crust
0.00 %
📊

Abundance In Oceans
0.00 %
📊

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.

Physical Properties of Lanthanum

Melting Point
920.00 °C
49
📊

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
📊

Brinell Hardness
350.00 MPa
📊

Vickers Hardness
360.00 MPa
📊

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
📊

Electronegativity

Pauling Electronegativity
1.10
📊

Sanderson Electronegativity
Not Available
📊

Allred Rochow Electronegativity
1.08
📊

Mulliken-Jaffe Electronegativity
Not Available
📊

Allen Electronegativity
Not Available
📊

Electropositivity

Pauling Electropositivity
2.90
📊

Ionization Energies

1st Energy Level
538.10 kJ/mol
📊

2nd Energy Level
1,067.00 kJ/mol
📊

3rd Energy Level
1,850.30 kJ/mol
📊

4th Energy Level
4,819.00 kJ/mol
📊

5th Energy Level
5,940.00 kJ/mol
📊

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
57
59
📊

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
📊

Number of Neutrons
82
📊

Number of Electrons
57
📊

Radius of an Atom

Atomic Radius
187.00 pm
📊

Covalent Radius
207.00 pm
📊

Van der Waals Radius
240.00 pm
📊

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

Density of Lanthanum

Density At Room Temperature
6.16 g/cm3
📊

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

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)
📊

Elasticity properties

Shear Modulus
14.30 GPa
📊

Bulk Modulus
27.90 GPa
📊

Young's Modulus
36.60 GPa
📊

Poisson Ratio
0.28
17
📊

Other Mechanical Properties
Ductile

Magnetic Properties of Lanthanum

Magnetic Characteristics of Lanthanum

Specific Gravity
6.17
📊

Magnetic Ordering
Paramagnetic
📊

Permeability
Not Available
📊

Susceptibility
Not Available
📊

Electrical Properties

Electrical Property
Conductor
📊

Resistivity
615.00 nΩ·m
📊

Electrical Conductivity
0.01 106/cm Ω
📊

Electron Affinity
48.00 kJ/mol
📊

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
📊

Enthalpy of Fusion
6.20 kJ/mol
📊

Enthalpy of Atomization
431.00 kJ/mol
📊

Standard Molar Entropy
56.90 J/mol.K
23
📊

Lanthanum Metal

Metals have been an inseparable component of major civilizations since centuries. Although metals were utilized since time unknown, researchers put considerable efforts in giving them appropriate names and defining their different properties and characteristics. This nomenclature process helped in arranging these metals in a well-organized fashion, known as the periodic table. In this periodic table, Lanthanum metal is also represented by the symbol La. This atomic symbol of Lanthanum is useful in indicating the position of metal La in the periodic table. If you are curious-headed or a science-geek, the common questions about metals are What is Lanthanum? What are its physical, chemical, mechanical, electrical and thermal properties? Find all the relevant facts about La metals in the following sections.

Periodic Table of Lanthanum

Periodic table of Lanthanum comments over its position in the periodic table, on the basis of parameters like group number, period row, atomic number and orbital block. The metals which have electrons falling in the same sub-shell are grouped under the same block corresponding to its respective orbital. Lanthanum metal belongs to Lanthanide Series category of the periodic table. Metals down a group have same valency while metals across a period have the same number of shells. Its group number (column number) is Not Available, whereas its period number is 6. It is placed under f block of the periodic table & is one of the prominent f block elements.

Lanthanum Metal Properties

Metals have certain properties by which they can be distinguished from one another. Magnetic and Atomic Structure of Lanthanum are few widely searched properties. Using the comparison facility, you can not only view the individual metal properties, but also compare the properties of multiple metals to get a thorough comparative analysis between the metals of your choice. Atomic number is a basic building block for the arrangement of metals in the periodic table. Atomic number of Lanthanum is 57 and its atomic weight is 138.91 amu. The electrons in its atom are arranged in orbitals as [Xe] 5d2 6s2. Nuclear particles in Lanthanum atom are 82 neutrons, 57 protons and 57 electrons.

Physical and Chemical Characteristics of Lanthanum

Physical and chemical characteristics of Lanthanum are two major criteria while comparing this metal with other metals. Physical Properties of Lanthanum include its external appearance, shininess at surface, color, etc. Properties like density, viscosity, melting and boiling point are also covered in this section. At room temperature, this metal is a Silvery White Solid. It starts melting at 920.00 °C. All these Lanthanum metal properties together define what is Lanthanum?

Modern Periodic Table

Modern Periodic Table
Group →

Period ↓

1

2

3

4

5

6

7

1

H

2

3

La-Lu
Ac-Lr

4

5

6

7

8

9

10

11

12

13

B

14

C
Si
Ge

15

N
P
As
Sb

16

O
S
Se
Te

17

F
Cl
Br
I
At

18

He
Ne
Ar
Kr
Xe
Rn
Og