Dysprosium

66
Dy
Gruppe
n/a
Periode
6
Blok
f
Protons
Electrons
Neutrons
66
66
97
General Properties
Atomnummer
66
Atommasse
162,5
Mass Number
163
Kategori
Lantanider
Farve
Silver
Radioactive
Nej
From the Greek word dysprositos, meaning hard to get at
Krystalstruktur
Simpel Hexagonal
History
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 i hver skal
2, 8, 18, 28, 8, 2
Elektronkonfiguration
[Xe] 4f10 6s2
Dy
Naturally occurring dysprosium is composed of 7 isotopes
Physical Properties
Tilstandsform
Fast stof
Massefylde
8,55 g/cm3
Smeltepunkt
1680,15 K | 1407 °C | 2564,6 °F
Kogepunkt
2840,15 K | 2567 °C | 4652,6 °F
Smeltevarme
11,1 kJ/mol
Fordampningsvarme
280 kJ/mol
Varmefylde
0,17 J/g·K
Abundance in Earth's crust
0,00062%
Abundance in Universe
2×10-7%
Ultrapure
Billede akkrediteringer: Images-of-elements
Ultrapure dysprosium dendrites
CAS Number
7429-91-6
PubChem CID Number
23912
Atomic Properties
Atomradius
178 pm
Kovalent radius
192 pm
Elektronegativitet
1,22 (Paulings skala)
Ionization Potential
5,9389 eV
Atomic Volume
19,0 cm3/mol
Varmeledningsevne
0,107 W/cm·K
Oxidationstrin
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
Stable Isotopes
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164Dy
Unstable Isotopes
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