Osmium Lanthanum Comparison
Periodic Table
Symbol
Os
La
Group Number
8
10
Not Available
Period Number
6
6
Block
d block
f block
Element Family
Transition Metal
Lanthanide
CAS Number
7440042
99+
7439910
99+
Space Group Name
P63/mmc
P63/mmc
Space Group Number
194.00
5
194.00
5
Facts
Interesting Facts
- Osmium metal does not oxidize in air unless it is heated.
- But if it heated den it forms Osmium Tetroxide, which is highly toxic.
- Lanthanum metal is highly malleable, ductile and sectile.
- If exposed to air Lanthanum metal oxidizes rapidly.
Sources
Found As a By-product, Found in Minerals, Mining
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Smithson Tennant
Carl Gustaf Mosander
Discovery
In 1803
In 1838
Abundance
Abundance In Universe
3 * 10-7 %
21
2 * 10-7 %
22
Abundance In Sun
~0.0000002 %
25
~0.0000002 %
25
Abundance In Meteorites
0.00 %
28
0.00 %
32
Abundance In Earth's Crust
0.00 %
99+
0.00 %
19
Abundance In Oceans
Not Available
0.00 %
29
Uses
Uses & Benefits
- Its has very limited uses and its alloys are very hard and are used in the manufacturing of pen tips, pivots, needles and electrical contacts.
- It is also used as industrial catalyst to speed up the chemical reaction.
- 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
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys, Mirror Manufacturing
Biological Properties
Toxicity
Highly Toxic
Low Toxic
Present in Human Body
No
Yes
In Bone
Not Available
0.08 p.p.m.
24
Physical Properties
Melting Point
3,045.00 °C
3
920.00 °C
99+
Boiling Point
5,027.00 °C
6
3,469.00 °C
18
Appearance
Physical State
Solid
Solid
Color
Silvery Bluish-Gray
Silvery White
Luster
Metallic
NA
Hardness
Mohs Hardness
7.00
3
2.50
14
Brinell Hardness
3,490.00 MPa
1
350.00 MPa
30
Vickers Hardness
Not Available
360.00 MPa
26
Speed of Sound
4,940.00 m/s
11
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 Properties
Chemical Formula
Os
La
Isotopes
Known Isotopes
35
4
31
8
Electronegativity
Pauling Electronegativity
2.20
4
1.10
99+
Allred Rochow Electronegativity
1.52
12
1.08
31
Allen Electronegativity
1.65
19
Not Available
Electropositivity
Pauling Electropositivity
1.80
99+
2.90
10
Ionization Energies
1st Energy Level
840.00 kJ/mol
12
538.10 kJ/mol
99+
2nd Energy Level
1,309.80 kJ/mol
99+
1,067.00 kJ/mol
99+
3rd Energy Level
1,600.00 kJ/mol
99+
1,850.30 kJ/mol
99+
4th Energy Level
Not Available
4,819.00 kJ/mol
22
5th Energy Level
Not Available
5,940.00 kJ/mol
25
Electrochemical Equivalent
1.77 g/amp-hr
38
1.73 g/amp-hr
99+
Electron Work Function
4.83 eV
8
3.50 eV
31
Other Chemical Properties
Chemical Stability, Ionization, Solubility
Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
76
40
57
99+
Electron Configuration
[Xe] 4f14 5d6 6s2
[Xe] 5d2 6s2
Crystal Structure
Hexagonal Close Packed (HCP)
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
DHCP-Crystal-Structure-of-Lanthanum.jpg#100
Atom
Number of Protons
76
39
57
99+
Number of Neutrons
114
25
82
99+
Number of Electrons
76
39
57
99+
Radius of an Atom
Atomic Radius
133.80 pm
99+
187.00 pm
8
Covalent Radius
Not Available
207.00 pm
6
Van der Waals Radius
216.00 pm
24
240.00 pm
13
Atomic Weight
190.23 amu
35
138.91 amu
99+
Atomic Volume
8.49 cm3/mol
99+
20.73 cm3/mol
16
Adjacent Atomic Numbers
Valence Electron Potential
91.40 (-eV)
12
40.71 (-eV)
99+
Lattice Constant
273.44 pm
99+
377.20 pm
28
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.58
14
1.62
2
Mechanical Properties
Density
Density At Room Temperature
22.59 g/cm3
9
6.16 g/cm3
99+
Density When Liquid (at m.p.)
20.00 g/cm3
1
5.94 g/cm3
99+
Tensile Strength
1,000.00 MPa
4
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.00 (Pa)
28
0.98 (Pa)
15
Elasticity properties
Shear Modulus
222.00 GPa
1
14.30 GPa
40
Bulk Modulus
462.00 GPa
1
27.90 GPa
99+
Young's Modulus
Not Available
36.60 GPa
99+
Poisson Ratio
0.25
24
0.28
17
Other Mechanical Properties
Ductile
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
22.57
2
6.17
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
81.20 nΩ·m
35
615.00 nΩ·m
7
Electrical Conductivity
0.11 106/cm Ω
18
0.01 106/cm Ω
99+
Electron Affinity
106.10 kJ/mol
9
48.00 kJ/mol
23
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
0.19 J/(kg K)
32
Molar Heat Capacity
24.70 J/mol·K
99+
27.11 J/mol·K
21
Thermal Conductivity
87.60 W/m·K
19
13.40 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
5.10 µm/(m·K)
99+
12.10 µm/(m·K)
32
Enthalpy
Enthalpy of Vaporization
627.60 kJ/mol
7
399.60 kJ/mol
17
Enthalpy of Fusion
29.30 kJ/mol
4
6.20 kJ/mol
99+
Enthalpy of Atomization
669.00 kJ/mol
6
431.00 kJ/mol
16
Standard Molar Entropy
32.60 J/mol.K
99+
56.90 J/mol.K
23
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