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Properties of Lanthanum and Iron

Lanthanum
Iron
Properties of Iron & Lanthanum


Physical Properties
Melting Point
920.00 °C   
99+
1,535.00 °C   
25
Boiling Point
3,469.00 °C   
18
2,750.00 °C   
37
Hardness
  
  
Mohs Hardness
2.50   
14
4.00   
10
Brinell Hardness
350.00 MPa   
30
200.00 MPa   
40
Vickers Hardness
360.00 MPa   
26
608.00 MPa   
18
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
65.00 %   
12
Speed of Sound
2,475.00 m/s   
37
5,120.00 m/s   
8
Allotropes
No   
Yes   
α Allotropes
Not Available   
?
It forms below 770 °C (the Curie point, TC); Then the Iron becomes magnetic in its alpha form; BCC crystal structureFerrite (Alpha Iron)   
β Allotropes
Not Available   
?
It forms below 912 °C; BCC crystal structureBeta Iron   
γ Allotropes
Not Available   
?
It forms below 1,394 °C; FCC crystal structureGamma Iron   
Chemical Properties
Chemical Formula
La   
Fe   
Isotopes
  
  
Known Isotopes
31   
8
26   
13
Electronegativity
  
  
Pauling Electronegativity
1.10   
99+
1.83   
14
Sanderson Electronegativity
Not Available   
2.20   
7
Allred Rochow Electronegativity
1.08   
31
1.64   
8
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
Not Available   
1.80   
12
Electropositivity
  
  
Pauling Electropositivity
2.90   
10
2.17   
40
Ionization Energies
  
  
1st Energy Level
538.10 kJ/mol   
99+
762.50 kJ/mol   
17
2nd Energy Level
1,067.00 kJ/mol   
99+
1,561.90 kJ/mol   
36
3rd Energy Level
1,850.30 kJ/mol   
99+
2,957.00 kJ/mol   
29
Electrochemical Equivalent
1.73 g/amp-hr   
99+
0.69 g/amp-hr   
99+
Electron Work Function
3.50 eV   
31
4.70 eV   
10
Other Chemical Properties
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility   
?
Corrosion is a process which converts refined metals to their more stable forms, for example, its oxide and hydroxide. This process of metals getting corroded is a gradual destruction of metals by chemical reactions.Corrosion, 
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility   
Mechanical Properties
Density
  
  
Density At Room Temperature
6.16 g/cm3   
99+
7.87 g/cm3   
99+
Density When Liquid (at m.p.)
5.94 g/cm3   
99+
6.98 g/cm3   
35
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
28
Vapor Pressure at 2000 K
0.98 (Pa)   
15
36.80 (Pa)   
5
Tensile Strength
Not Available   
11,000.00 MPa   
1
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
14.30 GPa   
40
82.00 GPa   
11
Bulk Modulus
27.90 GPa   
99+
170.00 GPa   
10
Young's Modulus
36.60 GPa   
99+
211.00 GPa   
9
Poisson Ratio
0.28   
17
0.29   
15
Other Mechanical Properties
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile   
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile, 
?
Malleability of metals defines their ability to deform under compressive stress; this is often characterized by the metals ability to form a thin sheet by hammering or rolling.Malleable, 
?
Weldability of metals defines their ability to be welded.This property of metals also known as joinability.Weldable   
Periodic Table
Symbol
La   
Fe   
Group Number
Not Available   
8   
10
Period Number
6   
4   
Block
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block   
?
The d-block is on the middle of the periodic table and includes elements from columns 3 through 12. These elements are also known as the transition metals because they show a transitivity in their properties i.e. they show a trend in their properties.d block   
Element Family
?
Total 15 metals are included in Lanthanide series from Lanthanum to Lutetium. Lanthanide series is located under f and d block of the periodic table.Lanthanide   
?
What is Transition Metal? All transition metals are placed under the d-block from group number 3 to 12. Transition metals show characteristics like malleability, ductility and are good conductor of electricity.Transition Metal   
Atomic Properties
Atomic Number
57   
99+
26   
99+
Atomic Weight
138.91 amu   
99+
55.85 amu   
99+
Atomic Volume
20.73 cm3/mol   
16
7.10 cm3/mol   
99+
Electron Configuration
[Xe] 5d2 6s2   
[Ar] 3d6 4s2   
Valence Electron Potential
40.71 (-eV)   
99+
67.00 (-eV)   
20
Atom
  
  
Number of Protons
57   
99+
26   
99+
Number of Neutrons
82   
99+
30   
99+
Number of Electrons
57   
99+
26   
99+
Crystal Structure
?
In crystallography, the hexagonal crystal structure and its double hexagonal crystal structure is one of the 7 crystal structure, The hexagonal lattice system consists of just one Bravais lattice type: the hexagonal shape.Double Hexagonal Close Packed (DHCP)   
?
BCC is a basis type of cubic crystal structure. In crystallography, the cubic crystals structure is a crystal system where the unit cell has a cube shaped structure. This is one of the simplest crystal structure found in crystals of metal.Body Centered Cubic (BCC)   
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Radius of an Atom
  
  
Atomic Radius
187.00 pm   
8
126.00 pm   
99+
Covalent Radius
207.00 pm   
6
132.00 pm   
99+
Van der Waals Radius
240.00 pm   
13
200.00 pm   
28
Lattice Constant
377.20 pm   
28
286.65 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.62   
2
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Cerium
  
Cobalt
  
Previous Element
Barium
  
Manganese
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
615.00 nΩ·m   
7
96.10 nΩ·m   
32
Electrical Conductivity
0.01 106/cm Ω   
99+
0.10 106/cm Ω   
20
Electron Affinity
48.00 kJ/mol   
23
15.70 kJ/mol   
34
Electrical Property
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor   
Magnetic Characteristics
  
  
Specific Gravity
6.17   
99+
7.20   
99+
Magnetic Ordering
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic   
Ferromagnetic   
Permeability
Not Available   
6.3 * 10-3 H/m   
1
Susceptibility
Not Available   
2,00,000.00   
1
Thermal Properties
Specific Heat
0.19 J/(kg K)   
32
0.44 J/(kg K)   
13
Thermal Conductivity
13.40 W/m·K   
99+
80.40 W/m·K   
22
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
27.11 J/mol·K   
21
25.10 J/mol·K   
99+
Thermal Expansion
12.10 µm/(m·K)   
32
11.80 µm/(m·K)   
33
Standard Molar Entropy
56.90 J/mol.K   
23
27.30 J/mol.K   
99+
Enthalpy
  
  
Enthalpy of Vaporization
399.60 kJ/mol   
17
351.00 kJ/mol   
23
Enthalpy of Fusion
6.20 kJ/mol   
99+
14.90 kJ/mol   
22
Enthalpy of Atomization
431.00 kJ/mol   
16
414.20 kJ/mol   
19
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