Yttrium - Periodic Table of the Elements

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PERIODIC TABLE OF THE ELEMENTS version 1.7


 Y

English:  Yttrium
French: Yttrium
Croatian: Itrij
German: Yttrium
Italian: Ittrio


Atomic number: 39
Group numbers: 3
Period: 5
Standard state (20 °C): solid

Yttrium was discovered by Carl Gustaf Mosander (Sweden) in 1843. Named after Ytterby, a village in Sweden. It is silvery, ductile, fairly reactive metal. Exposed surfaces form oxide film. Easily combustible, reacts with oxygen in water to release hydrogen.

Electronic configuration: [Kr] 4d¹ 5s²
Relative atomic mass: 88.90585(2)
Formal oxidation number: +3

Electronegativities: 1.22
Thermal conductivity: 17.2 W/(m K)
Electrical resistivity (20 °C): 57 μΩcm

Atomic radius: 177.6 pm
Density (g/dm3): 4469 (293 K)
Molar volume (cm3/mol): 19.89 (293 K)

Melting point: 1522 °C
Boiling point: 3345 °C
Critical temperature: 8677 °C

Heat of fusion: 17.2 kJ/mol
Heat of vaporization: 367.4 kJ/mol
Heat of atomization: 420.45 kJ/mol

Yttrium is found in minerals such as monazite, xenotime and yttria. Combined with europium to make red phosphors for colour TV's. Yttrium oxide and iron oxide combine to form a crystal garnet used in radar. The price of 99.9 % pure yttrium ingot is 229.00 € for 50 g. 38Sr <= 39Y => 40Zr ___________________ If you have comments, corrections or suggestions about this site, please send me a e-mail. Periodic Table of the Elements __________________________________ Last modified: 29.03.2003 Copyright © 1998-2003 by Eni Generalic