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Rh - Rhodium

Rhodium

 Rhodium 
Rh
Atomic Number: 45
Atomic Weight: 102.9055
Element Type: Transition Metal
Crystal Structure: Cubic Face Centered
Melting Point: 1964.0°C = 3567.2°F = 2237.15 K
Boiling Point: 3695.0°C = 6683.0°F = 3968.15 K
Critical Temp: °C = °F = K
Atomic Radius: 1.83 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.25 Å
Electronegativity: 2.28

History

(Gr. rhodon, rose) Wollaston discovered rhodium in 1803-4 in crude platinum ore hepresumably obtained from South America.


Sources

Rhodium occurs native with other platinum metals in river sands of the Urals and inNorth and South America. It is also found with other platinum metals in the copper-nickelsulfide area of the Sudbury, Ontario region. Although the quantity occurring here is verysmall, the large tonnages of nickel processed make the recovery commercially feasible. Theannual world production of rhodium is only 7 or 8 tons.



Science Quote

'To myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.'

Isaac Newton
(1643-1727)


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