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Yb - Ytterbium

Ytterbium

 Ytterbium 
Yb
Atomic Number: 70
Atomic Weight: 173.04
Element Type: Rare Earth Metal
Crystal Structure: Cubic Face Centered
Melting Point: 819.0°C = 1506.2°F = 1092.15 K
Boiling Point: 1196.0°C = 2184.8°F = 1469.15 K
Critical Temp: °C = °F = K
Atomic Radius: 2.4 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.74 Å
Electronegativity:

History

(Ytterby, village in Sweden) Marignac in 1878 discovered a new component, which hecalled ytterbia, in the earth then known as erbia. In 1907, Urbain separated ytterbia intotwo components, which he called neoytterbia and lutecia. The elements in these earths arenow known as ytterbium and lutetium, respectively. These elements are identical withaldebaranium and cassiopeium, discovered independently and at about the same time by vonWelsbach.


Sources

Ytterbium occurs along with other rare earths in a number of rare minerals. It iscommercially recovered principally from monazite sand, which contains about 0.03%.Ion-exchange and solvent extraction techniques developed in recent years have greatlysimplified the separation of the rare earths from one another.



Science Quote

'Strange is our situation here upon the earth. Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose.'

Albert Einstein
(1879-1955)


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