Home
 Compare Metals

Actinium vs Osmium

Actinium
Osmium
Osmium vs Actinium


Periodic Table
Symbol
Ac  
Os  
Group Number
Not Available  
8  
10
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440348  
99+
7440042  
99+
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
2
194.00  
5
Facts
Interesting Facts
Not Available  
  • 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
Obtained by Treating Radium with Neutrons, Ores of metals  
Found As a By-product, Found in Minerals, Mining  
History
  
  
Who Discovered
Friedrich Oskar Giesel  
Smithson Tennant  
Discovery
In 1902  
In 1803  
Abundance
  
  
Abundance In Universe
Not Available  
3 * 10-7 %  
21
Abundance In Sun
~-9999 %  
~0.0000002 %  
25
Abundance In Meteorites
Not Available  
0.00 %  
28
Abundance In Earth's Crust
Not Available  
0.00 %  
99+
Uses
Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • 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
NA  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
NA  
NA  
Other Uses
Alloys, Nuclear Research, Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Highly Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
37
Not Available  
In Bone
0.00 p.p.m.  
36
Not Available  
Physical Properties
Melting Point
1,227.00 °C  
38
3,045.00 °C  
3
Boiling Point
3,200.00 °C  
26
5,027.00 °C  
6
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery Bluish-Gray  
Luster
NA  
Metallic  
Hardness
  
  
Mohs Hardness
Not Available  
7.00  
3
Brinell Hardness
Not Available  
3,490.00 MPa  
1
Speed of Sound
Not Available  
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
Ac  
Os  
Isotopes
  
  
Known Isotopes
29  
10
35  
4
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
2.20  
4
Allred Rochow Electronegativity
1.00  
36
1.52  
12
Allen Electronegativity
Not Available  
1.65  
19
Electropositivity
  
  
Pauling Electropositivity
2.90  
10
1.80  
99+
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol  
99+
840.00 kJ/mol  
12
2nd Energy Level
1,170.00 kJ/mol  
99+
1,309.80 kJ/mol  
99+
3rd Energy Level
1,900.00 kJ/mol  
99+
1,600.00 kJ/mol  
99+
4th Energy Level
4,700.00 kJ/mol  
23
Not Available  
Electrochemical Equivalent
2.82 g/amp-hr  
18
1.77 g/amp-hr  
38
Electron Work Function
Not Available  
4.83 eV  
8
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Chemical Stability, Ionization, Solubility  
Atomic Properties
Atomic Number
89  
29
76  
40
Electron Configuration
[Rn] 6d1 7s2  
[Xe] 4f14 5d6 6s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
89  
29
76  
39
Number of Neutrons
138  
16
114  
25
Number of Electrons
89  
29
76  
39
Radius of an Atom
  
  
Atomic Radius
195.00 pm  
7
133.80 pm  
99+
Van der Waals Radius
Not Available  
216.00 pm  
24
Atomic Weight
227.00 amu  
25
190.23 amu  
35
Atomic Volume
22.54 cm3/mol  
11
8.49 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Rhenium
  
Next Element
Thorium
  
Iridium
  
Valence Electron Potential
38.60 (-eV)  
99+
91.40 (-eV)  
12
Lattice Constant
567.00 pm  
8
273.44 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
1.58  
14
Mechanical Properties
Density
  
  
Density At Room Temperature
10.00 g/cm3  
37
22.59 g/cm3  
9
Density When Liquid (at m.p.)
Not Available  
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
Not Available  
0.00 (Pa)  
28
Elasticity properties
  
  
Shear Modulus
Not Available  
222.00 GPa  
1
Bulk Modulus
Not Available  
462.00 GPa  
1
Poisson Ratio
Not Available  
0.25  
24
Other Mechanical Properties
NA  
Ductile  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
10.07  
28
22.57  
2
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Unknown  
Conductor  
Resistivity
Not Available  
81.20 nΩ·m  
35
Electrical Conductivity
Not Available  
0.11 106/cm Ω  
18
Electron Affinity
Not Available  
106.10 kJ/mol  
9
Thermal Properties
Specific Heat
0.12 J/(kg K)  
40
0.13 J/(kg K)  
39
Molar Heat Capacity
27.20 J/mol·K  
18
24.70 J/mol·K  
99+
Thermal Conductivity
12.00 W/m·K  
99+
87.60 W/m·K  
19
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
Not Available  
5.10 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
Not Available  
627.60 kJ/mol  
7
Enthalpy of Fusion
Not Available  
29.30 kJ/mol  
4
Enthalpy of Atomization
301.00 kJ/mol  
36
669.00 kJ/mol  
6
Standard Molar Entropy
56.50 J/mol.K  
25
32.60 J/mol.K  
99+
Periodic Table >>
<< All

Compare Actinide Series

Actinide Metals

Actinide Metals

» More Actinide Metals

Compare Actinide Series

» More Compare Actinide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!