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Y - Yttrium

Yttrium

 Yttrium 
Y
Atomic Number: 39
Atomic Weight: 88.9059
Element Type: Transition Metal
Crystal Structure: Hexagonal
Melting Point: 1522.0°C = 2771.6°F = 1795.15 K
Boiling Point: 3345.0°C = 6053.0°F = 3618.15 K
Critical Temp: °C = °F = K
Atomic Radius: 2.27 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.62 Å
Electronegativity: 1.22

History

(Ytterby, a village in Sweden near Vauxholm) Yttria, which is an earth containingyttrium, was discovered by Gadolin in 1794. Ytterby is the site of a quarry which yieldedmany unusual minerals containing rare earths and other elements. This small town, nearStockholm, bears the honor of giving names to erbium, terbium, and ytterbium as well asyttrium.

In 1843 Mosander showed that yttira could be resolved into the oxides (or earths) ofthree elements. The name yttria was reserved for the most basic one; the others were namederbia and terbia.


Sources

Yttrium occurs in nearly all of the rare-earth minerals. Analysis of lunar rock samplesobtained during the Apollo missions show a relatively high yttrium content.

It is recovered commercially from monazite sand, which contains about 3%, and frombastnasite, which contains about 0.2%. Wohler obtained the impure element in 1828 byreduction of the anhydrous chloride with potassium. The metal is now produced commerciallyby reduction of the fluoride with calcium metal. It can also be prepared by othertechniques.



Science Quote

'On the mountains of truth you can never climb in vain: either you will reach a point higher up today, or you will be training your powers so that you will be able to climb higher tomorrow.'

Friedrich Nietzsche
(1844-1900)


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