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Ruthenium Osmium Comparison


Osmium Ruthenium comparison


Periodic Table

Symbol
Ru   
Os   

Group Number
8   
10
8   
10

Period Number
5   
6   

Block
d block   
d block   

Element Family
Transition Metal   
Transition Metal   

CAS Number
7440188   
99+
7440042   
99+

Space Group Name
P63/mmc   
P63/mmc   

Space Group Number
194.00   
5
194.00   
5

Facts

Interesting Facts
  • Ruthenium element has been extracted from used nuclear fuel.
  • Ruthenium metal also produces as a by-product of the Nickel mining.
  
  • 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 Nickel Refining, Found in Minerals, Mining   
Found As a By-product, Found in Minerals, Mining   

History
  
  

Who Discovered
Karl Ernst Claus   
Smithson Tennant   

Discovery
In 1844   
In 1803   

Abundance
  
  

Abundance In Universe
4 * 10-7 %   
20
3 * 10-7 %   
21

Abundance In Sun
~0.0000005 %   
22
~0.0000002 %   
25

Abundance In Meteorites
0.00 %   
26
0.00 %   
28

Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
99+

Abundance In Oceans
0.00 %   
38
Not Available   

Uses

Uses & Benefits
  • It is used for producing chip resistors and contact.
  • Ruthenium oxide is used to coat the anodes cells for chlorine production in chemical industry. It also works as catalysts for ammonia and acetic acid reaction.
  
  • 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, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   

Medical Uses
Medical Research   
NA   

Other Uses
Alloys   
Alloys   

Biological Properties
  
  

Toxicity
Low Toxic   
Highly Toxic   

Present in Human Body
No   
No   

Physical Properties

Melting Point
2,250.00 °C   
8
3,045.00 °C   
3

Boiling Point
3,900.00 °C   
14
5,027.00 °C   
6

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery White   
Silvery Bluish-Gray   

Luster
Metallic   
Metallic   

Hardness
  
  

Mohs Hardness
6.50   
5
7.00   
3

Brinell Hardness
2,160.00 MPa   
3
3,490.00 MPa   
1

Speed of Sound
5,970.00 m/s   
4
4,940.00 m/s   
11

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
Ru   
Os   

Isotopes
  
  

Known Isotopes
26   
13
35   
4

Electronegativity
  
  

Pauling Electronegativity
2.20   
4
2.20   
4

Allred Rochow Electronegativity
1.42   
18
1.52   
12

Allen Electronegativity
1.54   
25
1.65   
19

Electropositivity
  
  

Pauling Electropositivity
1.80   
99+
1.80   
99+

Ionization Energies
  
  

1st Energy Level
710.20 kJ/mol   
32
840.00 kJ/mol   
12

2nd Energy Level
710.22 kJ/mol   
99+
1,309.80 kJ/mol   
99+

3rd Energy Level
2,747.00 kJ/mol   
37
1,600.00 kJ/mol   
99+

Electrochemical Equivalent
1.26 g/amp-hr   
99+
1.77 g/amp-hr   
38

Electron Work Function
4.71 eV   
9
4.83 eV   
8

Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Chemical Stability, Ionization, Solubility   

Atomic Properties

Atomic Number
44   
99+
76   
40

Electron Configuration
[Kr] 4d7 5s1   
[Xe] 4f14 5d6 6s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
rystal-Structure-of-Ruthenium.jpg#100   
BCC-Crystal-Structure-.jpg#100   

Atom
  
  

Number of Protons
44   
99+
76   
39

Number of Neutrons
57   
99+
114   
25

Number of Electrons
44   
99+
76   
39

Radius of an Atom
  
  

Atomic Radius
134.00 pm   
99+
133.80 pm   
99+

Covalent Radius
146.00 pm   
38
Not Available   

Van der Waals Radius
200.00 pm   
28
216.00 pm   
24

Atomic Weight
101.07 amu   
99+
190.23 amu   
35

Atomic Volume
8.30 cm3/mol   
99+
8.49 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

Previous Element
Technetium
  
Rhenium
  

Next Element
Rhodium
  
Iridium
  

Valence Electron Potential
64.00 (-eV)   
22
91.40 (-eV)   
12

Lattice Constant
270.59 pm   
99+
273.44 pm   
99+

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
1.58   
11
1.58   
14

Mechanical Properties

Density
  
  

Density At Room Temperature
12.45 g/cm3   
27
22.59 g/cm3   
9

Density When Liquid (at m.p.)
10.65 g/cm3   
16
20.00 g/cm3   
1

Tensile Strength
Not Available   
1,000.00 MPa   
4

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 2000 K
0.00 (Pa)   
23
0.00 (Pa)   
28

Elasticity properties
  
  

Shear Modulus
173.00 GPa   
4
222.00 GPa   
1

Bulk Modulus
220.00 GPa   
7
462.00 GPa   
1

Young's Modulus
447.00 GPa   
3
Not Available   

Poisson Ratio
0.30   
14
0.25   
24

Other Mechanical Properties
Ductile, Malleable   
Ductile   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
12.45   
19
22.57   
2

Magnetic Ordering
Paramagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Conductor   
Conductor   

Resistivity
71.00 nΩ·m   
38
81.20 nΩ·m   
35

Electrical Conductivity
0.14 106/cm Ω   
16
0.11 106/cm Ω   
18

Electron Affinity
101.30 kJ/mol   
10
106.10 kJ/mol   
9

Thermal Properties

Specific Heat
0.24 J/(kg K)   
24
0.13 J/(kg K)   
39

Molar Heat Capacity
24.06 J/mol·K   
99+
24.70 J/mol·K   
99+

Thermal Conductivity
117.00 W/m·K   
13
87.60 W/m·K   
19

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
6.40 µm/(m·K)   
99+
5.10 µm/(m·K)   
99+

Enthalpy
  
  

Enthalpy of Vaporization
567.80 kJ/mol   
10
627.60 kJ/mol   
7

Enthalpy of Fusion
25.50 kJ/mol   
7
29.30 kJ/mol   
4

Enthalpy of Atomization
603.00 kJ/mol   
9
669.00 kJ/mol   
6

Standard Molar Entropy
28.50 J/mol.K   
99+
32.60 J/mol.K   
99+

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