Dysprosium

66
Dy
Grupp
n/a
Period
6
Block
f
Protoner
Electrons
Neutroner
66
66
97
Generella Egenskaper
Atomnummer
66
Atommassa
162,5
Mass Number
163
Kategori
Lantanoider
Färg
Silver
Radioaktiv
Nej
From the Greek word dysprositos, meaning hard to get at
Kristallstruktur
Enkelt hexagonalt
Historia
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 skal
2, 8, 18, 28, 8, 2
Elektronkonfiguration
[Xe] 4f10 6s2
Dy
Naturally occurring dysprosium is composed of 7 isotopes
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
8,55 g/cm3
Smältpunkt
1680,15 K | 1407 °C | 2564,6 °F
Kokpunkt
2840,15 K | 2567 °C | 4652,6 °F
Smältvärme
11,1 kJ/mol
Ångbildningsvärme
280 kJ/mol
Specifik värmekapacitet
0,17 J/g·K
Abundance in Earth's crust
0,00062%
Abundance in Universe
2×10-7%
Ultrapure
Bildkrediter: Images-of-elements
Ultrapure dysprosium dendrites
CAS Number
7429-91-6
PubChem CID Number
23912
Atomära Egenskaper
Atomradie
178 pm
Kovalent radie
192 pm
Elektronegativitet
1,22 (Paulingskalan)
Jonisationspotential
5,9389 eV
Molvolym
19,0 cm3/mol
Värmeledningsförmåga
0,107 W/cm·K
Oxidationstillstånd
2, 3
Applications
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
Stabila isotoper
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164Dy
Instabila 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