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Bismuto ( Bi )

Informazioni sul Materiale

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General Description:  

Discovered in the fifteenth century, although its discoverer is not known.

Bismuth is a brittle metal which is silvery in colour with a pink tinge. It is stable in air and water. It has poor thermal and electrical properties and finds applications in the manufacture of fusible alloys, a range of materials with low melting points which are suitable for various applications including solders and thermal fuses. Pure bismuth shows a high absorbtion of gamma rays which makes it useful as a filter or window for these particles, whilst at the same time permitting the passage of neutrons.

   

Atomic Properties

Atomic number 83
Atomic radius - Goldschmidt ( nm ) 0,182
Atomic weight ( amu ) 208,9804
Crystal structure Rhombohedral
Electronic structure Xe 4f14 5d1O 6s2 6p3
Ionisation potential No. eV
1 7.29
2 16.7
3 25.6
4 45.3
5 56.0
6 88.3
Natural isotope distribution Mass No. %
209 100
Photo-electric work function ( eV ) 4,4
Thermal neutron absorption cross-section ( Barns ) 0,034
Valences shown 3, 5

Electrical Properties

Electrical resistivity @20C ( µOhmcm ) 117
Temperature coefficient @0-100C ( K-1 ) 0,0046
Thermal emf against Pt (cold 0C - hot 100C) ( mV ) -7,34

Mechanical Properties

Material condition Polycrystalline
Bulk modulus ( GPa ) 31,3
Hardness - Vickers 16-19
Poisson's ratio 0,33
Tensile modulus ( GPa ) 34,0

Physical Properties

Boiling point ( C ) 1560
Density @20C ( g cm-3 ) 9,80
Melting point ( C ) 271,3

Thermal Properties

Coefficient of thermal expansion @0-100C ( x10-6 K-1 ) 13,4
Latent heat of evaporation ( J g-1 ) 857
Latent heat of fusion ( J g-1 ) 52
Specific heat @25C ( J K-1 kg-1 ) 124
Thermal conductivity @0-100C ( W m-1 K-1 ) 7,9

Buy Bismuto on-line

Standard products are available in these forms
Cristallo singolo Foglio Lamina Pezzo grezzo Polvere Sputtering Target Tondino
Cristallo singolo Foglio Lamina Pezzo grezzo Polvere Sputtering Target Tondino

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