Relative atomic mass: 162.500 +- 0.001

English: Dysprosium
French: Dysprosium
Croatian: Disprozij
German: Dysprosium
Italian: Disprosio
Spanish: Disprosio

Atomic number: 66
Group numbers: 3
Period: 6
Standard state (20 oC): solid

Discovery: 1886 Paul-Emile Lecoq de Boisbaudran (FR)
Dysprosium was discovered by Paul-Emile Lecoq de Boisbaudran (FR) in 1886. The origin of the name comes from the Greek word dysprositos meaning hard to obtain. It is a soft, lustrous, silvery metal that reacts with oxygen and water. Dysprosium is a reductant and dissolves in acids. Metal ignites and burns readily. Dysprosium is usually found with erbium, holmium and other rare earths in some minerals such as monazite sand. Dysprosium uses are limited to the experimental and esoteric. Some isotopes of dysprosium are effective absorbers of thermal neutrons and are being considered for use in the control rods in nuclear reactors. The price of 99.9 % pure dysprosium ingot is 201.10 for 100 g.
Electronic configuration: [Xe] 4f10 6s2
Formal oxidation number: +3
Atomic radius: 175.2 pm

Electronegativities: 1.22
Thermal conductivity: 10.7 W/(m K)
Electrical resistivity (20 oC): 57 microOhm cm

Melting point: 1412 oC
Boiling point: 2567 oC

Heat of fusion: 17.2 kJ/mol
Heat of vaporization: 293 kJ/mol
Heat of atomization: 293.05 kJ/mol

65Tb <= 66Dy => 67Ho

ASCII Periodic Table of the Elements
29 Aug. 2017
Copyright © 1998-2017 by Eni Generalic.