Dysprosium

66
Dy
Gruppe
I/T
Periode
6
Blokk
f
Protoner
Elektroner
Nøytroner
66
66
97
Generelle egenskaper
Atomnummer
66
Atomvekt
162,5
Massetall
163
Kategori
Lantanoider
Farge
Sølv
Radioaktiv
Nei
From the Greek word dysprositos, meaning hard to get at
Krystallstruktur
Simple Hexagonal
Historie
French chemist Paul Émile Lecoq de Boisbaudran, while working with holmium oxide, separated dysprosium oxide from it in Paris in 1886.

His procedure for isolating the dysprosium involved dissolving dysprosium oxide in acid, then adding ammonia to precipitate the hydroxide.

It was not isolated in pure form until the development of ion exchange techniques in the 1950s.
Elektroner per energinivå
2, 8, 18, 28, 8, 2
Elektronkonfigurasjon
[Xe] 4f10 6s2
Dy
Naturally occurring dysprosium is composed of 7 isotopes
Fysikalske egenskaper
Fase
Fast stoff
Tetthet
8,55 g/cm3
Smeltepunkt
1680,15 K | 1407 °C | 2564,6 °F
Kokepunkt
2840,15 K | 2567 °C | 4652,6 °F
Smeltevarme
11,1 kJ/mol
Fordampningsvarme
280 kJ/mol
Spesifikk varmekapasitet
0,17 J/g·K
Forekomst i jordskorpa
0,00062%
Forekomst i universet
2×10-7%
Ultrapure
Bildekreditter: Images-of-elements
Ultrapure dysprosium dendrites
CAS Number
7429-91-6
PubChem CID Number
23912
Atomegenskaper
Atomradius
178 pm
Kovalent radius
192 pm
Elektronegativitet
1,22 (Pauling-skalaen)
Ioniseringsenergi
5,9389 eV
Molart volum
19,0 cm3/mol
Termisk ledningsevne
0,107 W/cm·K
Oksidasjonstilstander
2, 3
Bruksområder
Dysprosium oxide-nickel cermets are used in neutron-absorbing control rods in nuclear reactors.

Dysprosium is used in data storage applications such as compact discs and hard discs.

It is also used in dosimeters for measuring ionizing radiation.

Dysprosium iodide and dysprosium bromide are used in high intensity metal-halide lamps.
Dysprosium is considered to be moderately toxic
Isotoper
Stabile isotoper
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164Dy
Ustabile isotoper
138Dy, 139Dy, 140Dy, 141Dy, 142Dy, 143Dy, 144Dy, 145Dy, 146Dy, 147Dy, 148Dy, 149Dy, 150Dy, 151Dy, 152Dy, 153Dy, 154Dy, 155Dy, 157Dy, 159Dy, 165Dy, 166Dy, 167Dy, 168Dy, 169Dy, 170Dy, 171Dy, 172Dy, 173Dy