Gadolinyum
64
Gd
Grup
yok
Periyot
6
Blok
f
Protonlar
Elektronlar
Nötronlar
64
64
93
Temel Özellikleri
Atom numarası
64
Atom ağırlığı
157,25
Kütle Numarası
157
Kategori
Lantanit
Renk
Gümüşi
Radyoaktif
Hayir
From gadolinite, a mineral named for Gadolin, a Finnish chemist
Kristal yapısı
Basit altıgen
Tarihi
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.
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.
Enerji seviyesi başına Elektronlar
2, 8, 18, 25, 9, 2
Elektron dizilimi
[Xe] 4f7 5d1 6s2
Gadolinium has the highest neutron cross-section among any stable nuclides
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
7,895 g/cm3
Ergime noktası
1585,15 K | 1312 °C | 2393,6 °F
Kaynama noktası
3546,15 K | 3273 °C | 5923,4 °F
Ergime ısısı
10 kJ/mol
Buharlaşma ısısı
305 kJ/mol
Isı kapasitesi
0,236 J/g·K
Dünya kabuğundaki bulunulabilirliği
0,00052%
Evrendeki bulunulabilirliği
2×10-7%
CAS Numarası
7440-54-2
PubChem CID Numarası
23982
Atom Özellikleri
Atom yarıçapı
180 pm
Kovalent yarıçapı
196 pm
Elektronegatifliği
1,2 (Pauling ölçeği)
İyonlaşma enerjisi
6,1501 eV
Atomik Hacim
19,9 cm3/mol
Isıl iletkenlik
0,106 W/cm·K
Yükseltgenme seviyeleri
1, 2, 3
Uygulamalar
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.
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
İzotoplar
Kararlı izotoplar
154Gd, 155Gd, 156Gd, 157Gd, 158Gd, 160GdKararsız izotoplar
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