Periodic table

 

 

Atomic number:66

Group numbers:3

Period:6

Electronic configuration:[Xe] 4f¹⁰ 6s²

Formal oxidation number:+3

Electronegativities:1.22

Atomic radius / pm:175.2

Relative atomic mass:162.500 ± 0.001

 

Dysprosium was discovered by Paul-Émile 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.

PHYSICAL PROPERTIES

Density / g dm^-3:8550 (293 K)

Molar volume / cm³mol^-1:19.01 (293 K)

Electrical resistivity / μΩcm:57 (20 °C)

THERMAL PROPERTIES

Thermal conductivity / W m^-1K^-1:10.7

Melting point / °C:1412

Boiling point / °C:2567

Heat of fusion / kJ mol^-1:17.2

Heat of vaporization / kJ mol^-1:293

Heat of atomization / kJ mol^-1:293.05

IONIZATION ENERGIES

First ionization energy / kJ mol^-1:573.02

Second ionization energy / kJ mol^-1:1125.99

Third ionization energy / kJ mol^-1:2199.88

ABUNDANCE OF ELEMENTS

in the atmosphere / ppm:-

in the Earth's crust / ppm:3.6

in the oceans / ppm:0.0000002

CRYSTALLOGRAPHIC DATA

ISOTOPES

REDUCTION POTENTIALS

 

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Citing this page:

Generalic, Eni. "Dysprosium." EniG. Periodic Table of the Elements. 3 Jan. 2012. KTF-Split. {Date of access}. <http://www.periodni.com/dy.html>.