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Ruthenium ( Ru )

Material Information

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Bar Foil Lump Microfoil Powder Rod Single Crystal Sputtering Target
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General Description:  

Ruthenium was initially discovered in 1808 by J.A. Sniadecki at the University of Vilnius, Lithuania and then again by G.W. Osnann in 1828 at the University of Tartu, Russia.

Ruthenium is a rare member of the platinum group of metals (abundance 0.001 ppm in the earth's crust). It is a lustrous, silvery colored metal which is unaffected by air, water and acids, but is soluble in fused alkalis. Extraction of the metal is achieved by several techniques; for example, extraction of the mixed platinum group metals by dissolution in aqua regia, followed by treatment of the various soluble and insoluble fractions.

Applications of the metal are limited; as a pure metal, ruthenium is extremely hard and brittle and, consequently, difficult to machine. It is relatively unreactive, and is used as an alloying element with platinum and palladium to produce alloys which have improved wear resistance, and with titanium to improve the material's corrosion resistance. In all cases, the ruthenium addition has to be less than 15%, otherwise the resultant alloy is too hard to work.

   

Atomic Properties

Atomic number 44
Atomic radius - Goldschmidt ( nm ) 0.134
Atomic weight ( amu ) 101.07
Crystal structure Hexagonal close packed
Electronic structure Kr 4d7 5s1
Ionization potential No. eV
1 7.36
2 16.8
3 28.5
Natural isotope distribution Mass No. %
96 5.5
98 1.9
99 12.7
100 12.6
101 17.1
102 31.6
104 18.6
Photo-electric work function ( eV ) 4.71
Thermal neutron absorption cross-section ( Barns ) 3.0
Valences shown 0, 1, 2, 3, 4, 5, 6, 7, 8

Electrical Properties

Electrical resistivity @20C ( µOhmcm ) 7.7
Temperature coefficient @0-100C ( K-1 ) 0.0041
Superconductivity critical temperature ( K ) 0.49

Mechanical Properties

Material condition Soft Hard Polycrystalline
Bulk modulus ( GPa )     286
Hardness - Vickers 350 750
Poisson's ratio     0.25
Tensile modulus ( GPa )     432
Tensile strength ( MPa ) 495
Yield strength ( MPa ) 372

Physical Properties

Boiling point ( C ) 3900
Density @20C ( g cm-3 ) 12.2
Melting point ( C ) 2310

Thermal Properties

Coefficient of thermal expansion @0-100C ( x10-6 K-1 ) 9.6
Latent heat of evaporation ( J g-1 ) 5610
Latent heat of fusion ( J g-1 ) 252
Specific heat @25C ( J K-1 kg-1 ) 238
Thermal conductivity @0-100C ( W m-1 K-1 ) 117
All information and technical data are given as a guide only. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy.

Buy Ruthenium on-line

We stock and supply the following standard forms:
Bar Foil Lump Microfoil Powder Rod Single Crystal Sputtering Target
Bar Foil Lump Microfoil Powder Rod Single Crystal Sputtering Target

Choose a form to search our on-line catalog  

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