Disprosi
66
Dy
Grup
n/a
Període
6
Bloc
f
Protons
Electrons
Neutrons
66
66
97
Propietats Generals
Nombre atòmic
66
Massa atòmica
162,5
Nombre de massa
163
Categoria
Lantànids
Color
Plata
Radioactiu
No
From the Greek word dysprositos, meaning hard to get at
Estructura cristal·lina
Hexàgon simple
Història
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.
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 capa
2, 8, 18, 28, 8, 2
Configuració electrònica
[Xe] 4f10 6s2
Naturally occurring dysprosium is composed of 7 isotopes
Propietats Físiques
Fase
Sòlid
Densitat
8,55 g/cm3
Punt de fusió
1680,15 K | 1407 °C | 2564,6 °F
Punt d'ebullició
2840,15 K | 2567 °C | 4652,6 °F
Entalpia de fusió
11,1 kJ/mol
Entalpia de vaporització
280 kJ/mol
Capacitat tèrmica específica
0,17 J/g·K
Abundància a l'escorça terrestre
0,00062%
Abundància a l'univers
2×10-7%
Número CAS
7429-91-6
Número CID de PubChem
23912
Propietats Atòmiques
Radi atòmic
178 pm
Radi covalent
192 pm
Electronegativitat
1,22 (Escala de Pauling)
Potencial d'ionització
5,9389 eV
Volum atòmic
19,0 cm3/mol
Conductivitat tèrmica
0,107 W/cm·K
Estats d'oxidació
2, 3
Aplicacions
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 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
Isòtops
Isòtops estables
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164DyIsòtops inestables
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