Gadolinium

64
Gd
Kumpulan
Tiada
Kala
6
Blok
f
Proton
Elektron
Neutron
64
64
93
Ciri-Ciri Am
Nombor atom
64
Berat atom
157.25
Nombor jisim
157
Kategori
Lantanid
Warna
Perak
Radioaktif
Tidak
From gadolinite, a mineral named for Gadolin, a Finnish chemist
Struktur hablur
Hexagonal Ringkas
Sejarah
Gadolinium was first detected spectroscopically in 1880 by the Swiss chemist Jean Charles Galissard de Marignac who separated its oxide.

He observed spectroscopic lines due to gadolinium in samples of gadolinite and in the separate mineral cerite.

The metal was isolated by Paul Emile Lecoq de Boisbaudran in 1886.
Bilangan elektron per petala
2, 8, 18, 25, 9, 2
Konfigurasi elektron
[Xe] 4f7 5d1 6s2
Gd
Gadolinium has the highest neutron cross-section among any stable nuclides
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
7.895 g/cm3
Takat lebur
1585.15 K | 1312 °C | 2393.6 °F
Takat didih
3546.15 K | 3273 °C | 5923.4 °F
Haba pelakuran
10 kJ/mol
Haba pengewapan
305 kJ/mol
Muatan haba molar
0.236 J/g·K
Banyak pada kerak bumi
0.00052%
Banyak pada alam semesta
2×10-7%
Ultrapure
Kredit imej: Images-of-elements
Ultrapure amorphous gadolinium
Nombor CAS
7440-54-2
PubChem CID Number
23982
Ciri-Ciri Atom
Jejari atom
180 pm
Jejari kovalen
196 pm
Keelektronegatifan
1.2 (Skala Pauling)
Kebolehan mengion
6.1501 eV
Isipadu atom
19.9 cm3/mol
Daya pengaliran terma
0.106 W/cm·K
Keadaan pengoksidaan
1, 2, 3
Aplikasi
Gadolinium is used to make gadolinium yttrium garnets which have microwave applications.

It is also used in intravenous radiocontrast agents in magnetic resonance imaging (MRI).

Gadolinium compounds are used for making green phosphors for color TV tubes, and in manufacturing compact discs.
Gadolinium is considered to be moderately toxic
Isotop
Isotop stabil
154Gd, 155Gd, 156Gd, 157Gd, 158Gd, 160Gd
Isotop tidak stabil
134Gd, 135Gd, 136Gd, 137Gd, 138Gd, 139Gd, 140Gd, 141Gd, 142Gd, 143Gd, 144Gd, 145Gd, 146Gd, 147Gd, 148Gd, 149Gd, 150Gd, 151Gd, 152Gd, 153Gd, 159Gd, 161Gd, 162Gd, 163Gd, 164Gd, 165Gd, 166Gd, 167Gd, 168Gd, 169Gd