Disprozij

66
Dy
Skupina
n/a
Perioda
6
Blok
f
Protons
Electrons
Neutrons
66
66
97
General Properties
Vrstno število
66
Atomska teža
162,5
Mass Number
163
Kategorija
Lantanoidi
Barva
Silver
Radioactive
Ne
From the Greek word dysprositos, meaning hard to get at
Kristalna struktura
Heksagonalna
Zgodovina
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.
Electrons per shell
2, 8, 18, 28, 8, 2
Razporeditev elektronov
[Xe] 4f10 6s2
Dy
Naturally occurring dysprosium is composed of 7 isotopes
Physical Properties
Faza snovi
Trdnina
Gostota
8,55 g/cm3
Tališče
1680,15 K | 1407 °C | 2564,6 °F
Vrelišče
2840,15 K | 2567 °C | 4652,6 °F
Talilna toplota
11,1 kJ/mol
Izparilna toplota
280 kJ/mol
Toplotna kapaciteta
0,17 J/g·K
Abundance in Earth's crust
0,00062%
Abundance in Universe
2×10-7%
Ultrapure
Zasluge za slike: Images-of-elements
Ultrapure dysprosium dendrites
CAS Number
7429-91-6
PubChem CID Number
23912
Atomic Properties
Atomski polmer
178 pm
Kovalentni polmer
192 pm
Elektronegativnost
1,22 (Paulingova lestvica)
Ionization Potential
5,9389 eV
Atomic Volume
19,0 cm3/mol
Toplotna prevodnost
0,107 W/cm·K
Oksidacijska stanja
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
Isotopes
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