Gadolinij
64
Gd
Skupina
n/p
Perioda
6
Blok
f
Protoni
Elektroni
Nevtroni
64
64
93
Splošne lastnosti
Vrstno število
64
Atomska teža
157,25
Masno število
157
Kategorija
Lantanoidi
Barva
Srebrna
Radioaktivno
Ne
From gadolinite, a mineral named for Gadolin, a Finnish chemist
Kristalna struktura
Heksagonalna
Zgodovina
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.
Elektroni po lupinah
2, 8, 18, 25, 9, 2
Razporeditev elektronov
[Xe] 4f7 5d1 6s2
Gadolinium has the highest neutron cross-section among any stable nuclides
Fizikalne lastnosti
Faza snovi
Trdnina
Gostota
7,895 g/cm3
Tališče
1585,15 K | 1312 °C | 2393,6 °F
Vrelišče
3546,15 K | 3273 °C | 5923,4 °F
Talilna toplota
10 kJ/mol
Izparilna toplota
305 kJ/mol
Toplotna kapaciteta
0,236 J/g·K
Zastopanost v Zemljini skorji
0,00052%
Zastopanost v vesolju
2×10-7%
CAS številka
7440-54-2
PubChem CID številka
23982
Atomske lastnosti
Atomski polmer
180 pm
Kovalentni polmer
196 pm
Elektronegativnost
1,2 (Paulingova lestvica)
Ionizacijski potencial
6,1501 eV
Atomski volumen
19,9 cm3/mol
Toplotna prevodnost
0,106 W/cm·K
Oksidacijska stanja
1, 2, 3
Uporabe
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
Izotopi
Stabilni izotopi
154Gd, 155Gd, 156Gd, 157Gd, 158Gd, 160GdNestabilni izotopi
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