Symbol
Ru
  
Os
  
Period Number
5
  
6
  
Block
d block
  
d block
  
Element Family
Transition Metal
  
Transition Metal
  
Space Group Name
P63/mmc
  
P63/mmc
  
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 Sun
~0.0000005 %
  
22
~0.0000002 %
  
25
Abundance In Earth's Crust
Abundance In Oceans
Not Available
  
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
  
Boiling Point
3,900.00 °C
  
14
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Silvery Bluish-Gray
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
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 Formula
Ru
  
Os
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Allred Rochow Electronegativity
Electropositivity
  
  
Pauling Electropositivity
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
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
  
Chemical Stability, Ionization, Solubility
  
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
  
  
Radius of an Atom
  
  
Covalent Radius
Not Available
  
Atomic Weight
101.07 amu
  
99+
Atomic Volume
8.30 cm3/mol
  
99+
8.49 cm3/mol
  
99+
Adjacent Atomic Numbers
  
  
Valence Electron Potential
64.00 (-eV)
  
22
91.40 (-eV)
  
12
Lattice Angles
π/2, π/2, 2 π/3
  
π/2, π/2, 2 π/3
  
Density
  
  
Density At Room Temperature
12.45 g/cm3
  
27
Density When Liquid (at m.p.)
10.65 g/cm3
  
16
Tensile Strength
Not Available
  
1,000.00 MPa
  
4
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Elasticity properties
  
  
Young's Modulus
Not Available
  
Other Mechanical Properties
Ductile, Malleable
  
Ductile
  
Magnetic Characteristics
  
  
Magnetic Ordering
Paramagnetic
  
Paramagnetic
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Conductor
  
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
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+