Disprosium

66
Dy
Golongan
n/a
Periode
6
Blok
f
Proton
Elektron
Neutron
66
66
97
Sifat Umum
Nomor atom
66
Massa atom
162,5
Nomor massa
163
Kategori
Lantanida
Warna
Perak
Radioaktif
Tidak
From the Greek word dysprositos, meaning hard to get at
Struktur kristal
Segienam Sederhana
Sejarah
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.
Elektron per kulit
2, 8, 18, 28, 8, 2
Konfigurasi elektron
[Xe] 4f10 6s2
Dy
Naturally occurring dysprosium is composed of 7 isotopes
Sifat Fisika
Fase
Solid
Kepadatan
8,55 g/cm3
Titik lebur
1680,15 K | 1407 °C | 2564,6 °F
Titik didih
2840,15 K | 2567 °C | 4652,6 °F
Kalor peleburan
11,1 kJ/mol
Kalor penguapan
280 kJ/mol
Kapasitas kalor molar
0,17 J/g·K
Kelimpahan di kerak bumi
0,00062%
Kelimpahan di alam semesta
2×10-7%
Ultrapure
Kredit Gambar: Images-of-elements
Ultrapure dysprosium dendrites
Nomor CAS
7429-91-6
PubChem CID Number
23912
Sifat Atom
Jari-jari atom
178 pm
Jari-jari kovalen
192 pm
Elektronegativitas
1,22 (Skala Pauling)
Potensi Ionisasi
5,9389 eV
Volume atom
19,0 cm3/mol
Kondusivitas termal
0,107 W/cm·K
Bilangan oksidasi
2, 3
Aplikasi
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
Isotop
Isotop stabil
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164Dy
Isotop tidak stabil
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