Disprosiu
66
Dy
Grupă
n/a
Perioadă
6
Bloc
f
Protoni
Electroni
Neutroni
66
66
97
Proprietăți Generale
Număr atomic
66
Masă atomică
162,5
Numar de masa
163
Categorie
Lantanide
Culoare
Argint
Radioactive
Nu
Din cuvântul grecesc dysprositos, însemnând, greu de obținut
Structură cristalină
Sistemul Hexagonal
Istoric
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.
Electroni pe nivelul de energie
2, 8, 18, 28, 8, 2
Configurație electronică
[Xe] 4f10 6s2
Naturally occurring dysprosium is composed of 7 isotopes
Proprietăți Fizice
Fază
Solid
Densitate
8,55 g/cm3
Punct de topire
1680,15 K | 1407 °C | 2564,6 °F
Punct de fierbere
2840,15 K | 2567 °C | 4652,6 °F
Energie de fuziune
11,1 kJ/mol
Energie de evaporare
280 kJ/mol
Căldură specifică
0,17 J/g·K
Abundența în scoarța Pământului
0,00062%
Abundența în Univers
2×10-7%
Numarul CAS
7429-91-6
Număr CID PubChem
23912
Proprietăți Atomice
Rază atomică
178 pm
Rază de covalență
192 pm
Electronegativitate
1,22 (Scara lui Pauling)
Potențial de ionizare
5,9389 eV
Volum molar
19,0 cm3/mol
Conductivitate termică
0,107 W/cm·K
Număr de oxidare
2, 3
Aplicații
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
Izotopi
Izotopi stabili
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164DyIzotopi instabili
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