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Niobium vs Osmium

Niobium
Osmium
Osmium vs Niobium


Periodic Table
Symbol
Nb  
Os  
Group Number
5  
13
8  
10
Period Number
5  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440031  
99+
7440042  
99+
Space Group Name
Im_ 3m  
P63/mmc  
Space Group Number
229.00  
2
194.00  
7
Facts
Interesting Facts
  • Niobium metal was used to get called Columbium in past.
  • Niobium metal found freely in nature (abundance).
  
  • Osmium metal does not oxidize in air unless it is heated.
  • But if it heated den it forms Osmium Tetroxide, which is highly toxic.
  
Sources
By-product of Tin Extraction, Found in Minerals, Mining, Ores of Minerals  
Found As a By-product, Found in Minerals, Mining  
History
  
  
Who Discovered
Charles Hatchett  
Smithson Tennant  
Discovery
In 1801  
In 1803  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
22
Abundance In Sun
0.00 %  
23
0.00 %  
25
Abundance In Meteorites
0.00 %  
35
0.00 %  
28
Abundance In Earth's Crust
0.00 %  
25
0.00 %  
99+
Abundance In Oceans
0.00 %  
34
0.00 %  
99+
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Niobium alloys are used in jet engines and rockets and spacecraft, beams and girders for buildings and oil and gas pipelines.
  • It is used superconducting magnets in particles accelerators, NMR and MRI equipment.
  
  • 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.
  
Industrial Uses
Aerospace Industry, Ammunition Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Low Toxic  
Highly Toxic  
Present in Human Body
Yes  
No  
In Blood
0.01 Blood/mg dm-3  
25
0.00 Blood/mg dm-3  
37
In Bone
0.07 p.p.m.  
30
0.00 p.p.m.  
99+
Physical
Melting Point
2,468.00 °C  
6
3,045.00 °C  
3
Boiling Point
2,468.00 °C  
99+
5,027.00 °C  
6
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gray  
Silvery Bluish-Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
7.00  
3
Brinell Hardness
735.00 MPa  
15
3,490.00 MPa  
1
Vickers Hardness
870.00 MPa  
19
3,920.00 MPa  
1
Speed of Sound
3,480.00 m/s  
31
4,940.00 m/s  
15
Optical Properties
  
  
Refractive Index
2.30  
8
2.07  
12
Reflectivity
70.00 %  
13
80.00 %  
7
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Nb  
Os  
Isotopes
  
  
Known Isotopes
17  
22
35  
4
Electronegativity
  
  
Pauling Electronegativity
1.60  
24
2.20  
5
Sanderson Electronegativity
1.42  
20
2.20  
8
Allred Rochow Electronegativity
1.23  
26
1.52  
13
Mulliken-Jaffe Electronegativity
1.60  
22
2.20  
6
Allen Electronegativity
1.41  
35
1.65  
22
Electropositivity
  
  
Pauling Electropositivity
2.40  
31
1.80  
99+
Ionization Energies
  
  
1st Energy Level
652.10 kJ/mol  
99+
840.00 kJ/mol  
12
2nd Energy Level
1,380.00 kJ/mol  
99+
1,309.80 kJ/mol  
99+
3rd Energy Level
2,416.00 kJ/mol  
99+
1,600.00 kJ/mol  
99+
4th Energy Level
3,700.00 kJ/mol  
99+
840.00 kJ/mol  
99+
5th Energy Level
4,877.00 kJ/mol  
99+
8,400.00 kJ/mol  
10
6th Energy Level
9,847.00 kJ/mol  
17
8,400.00 kJ/mol  
30
7th Energy level
12,100.00 kJ/mol  
14
8,400.00 kJ/mol  
25
8th Energy Level
6,520.00 kJ/mol  
99+
8,400.00 kJ/mol  
25
9th Energy Level
5,470.00 kJ/mol  
99+
5,280.00 kJ/mol  
99+
10th Energy Level
5,470.00 kJ/mol  
99+
8,400.00 kJ/mol  
26
11th Energy Level
6,520.00 kJ/mol  
99+
8,400.00 kJ/mol  
23
12th Energy Level
6,520.00 kJ/mol  
99+
8,400.00 kJ/mol  
99+
13th Energy Level
5,470.00 kJ/mol  
99+
8,400.00 kJ/mol  
18
14th Energy Level
691.00 kJ/mol  
99+
840.00 kJ/mol  
99+
15th Energy Level
65,200.00 kJ/mol  
35
84,000.00 kJ/mol  
12
16th Energy Level
652.10 kJ/mol  
99+
840.00 kJ/mol  
99+
17th Energy Level
652.10 kJ/mol  
99+
840.00 kJ/mol  
29
18th Energy Level
6,520.00 kJ/mol  
37
8,400.00 kJ/mol  
18
19th Energy Level
652.10 kJ/mol  
99+
840.00 kJ/mol  
27
20th Energy Level
652.00 kJ/mol  
38
840.00 kJ/mol  
19
21st Energy Level
652.10 kJ/mol  
99+
840.00 kJ/mol  
39
22nd Energy Level
694.00 kJ/mol  
30
840.00 kJ/mol  
15
23rd Energy Level
4,490.00 kJ/mol  
30
840.00 kJ/mol  
99+
24th Energy Level
652.10 kJ/mol  
33
840.00 kJ/mol  
11
25th Energy Level
652.10 kJ/mol  
35
840.00 kJ/mol  
9
26th Energy Level
652.10 kJ/mol  
34
840.00 kJ/mol  
9
27th Energy Level
652.10 kJ/mol  
35
713.30 kJ/mol  
24
28th Energy Level
652.10 kJ/mol  
40
840.10 kJ/mol  
13
29th Energy Level
652.10 kJ/mol  
99+
840.00 kJ/mol  
13
30th Energy Level
652.00 kJ/mol  
37
840.00 kJ/mol  
9
Electrochemical Equivalent
0.69 g/amp-hr  
99+
1.77 g/amp-hr  
99+
Electron Work Function
4.30 eV  
25
4.83 eV  
13
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
41  
99+
76  
40
Electron Configuration
[Kr] 4d4 5s1  
[Xe] 4f14 5d6 6s2  
Crystal Structure
Body Centered Cubic (BCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
41  
99+
76  
39
Number of Neutrons
52  
99+
114  
26
Number of Electrons
41  
99+
76  
39
Radius of an Atom
  
  
Atomic Radius
146.00 pm  
37
133.80 pm  
99+
Covalent Radius
164.00 pm  
30
128.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
216.00 pm  
30
Atomic Weight
92.91 amu  
99+
190.23 amu  
35
Atomic Volume
10.87 cm3/mol  
99+
8.49 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Zirconium
  
Rhenium
  
Next Element
Molybdenum
  
Iridium
  
Valence Electron Potential
104.00 (-eV)  
8
91.40 (-eV)  
12
Lattice Constant
330.04 pm  
99+
273.44 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.47  
99+
1.58  
37
Mechanical
Density
  
  
Density At Room Temperature
8.57 g/cm3  
99+
22.59 g/cm3  
9
Density When Liquid (at m.p.)
8.57 g/cm3  
99+
20.00 g/cm3  
11
Tensile Strength
330.00 MPa  
14
1,000.00 MPa  
4
Viscosity
0.00  
22
0.00  
3
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
36
0.00 (Pa)  
39
Elasticity properties
  
  
Shear Modulus
38.00 GPa  
20
222.00 GPa  
1
Bulk Modulus
170.00 GPa  
10
462.00 GPa  
1
Young's Modulus
105.00 GPa  
22
528.00 GPa  
1
Poisson Ratio
0.40  
4
0.25  
24
Other Mechanical Properties
Ductile, Malleable  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
8.57  
99+
22.57  
11
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
4
0.00 H/m  
17
Susceptibility
0.00  
30
0.00  
17
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
152.00 nΩ·m  
23
81.20 nΩ·m  
35
Electrical Conductivity
0.07 106/cm Ω  
33
0.11 106/cm Ω  
21
Electron Affinity
86.10 kJ/mol  
14
106.10 kJ/mol  
10
Thermal
Specific Heat
0.26 J/(kg K)  
20
0.13 J/(kg K)  
40
Molar Heat Capacity
24.60 J/mol·K  
99+
24.70 J/mol·K  
99+
Thermal Conductivity
53.70 W/m·K  
29
87.60 W/m·K  
19
Critical Temperature
2,750.00 K  
7
3,300.00 K  
3
Thermal Expansion
7.30 µm/(m·K)  
99+
5.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
696.60 kJ/mol  
5
627.60 kJ/mol  
8
Enthalpy of Fusion
27.20 kJ/mol  
6
29.30 kJ/mol  
4
Enthalpy of Atomization
745.00 kJ/mol  
4
669.00 kJ/mol  
6
Standard Molar Entropy
36.40 J/mol.K  
99+
32.60 J/mol.K  
99+
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