gadolinium
Sign in to saveGadolinium is a chemical element; it has symbol Gd and atomic number 64. It is a silvery-white metal when oxidation is removed. Gadolinium is a malleable and ductile rare-earth element. It reacts with atmospheric oxygen or moisture slowly to form a black oxide coating. Gadolinium below its Curie point of is ferromagnetic, with an attraction to a magnetic field higher than that of nickel. Above this temperature it is the most paramagnetic element. It is found in nature only in an oxidized form. When separated, it usually has impurities of the other rare earths because of their similar chemical
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Gadolinium is a rare-earth metal element that is silvery-white, malleable, and has unusual magnetic properties—it's ferromagnetic below a certain temperature and becomes the most paramagnetic element when heated above that point. It's found in nature only in oxidized form and matters because of its strong magnetic behavior, which makes it valuable for various applications requiring magnetic properties.
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Article
24 sectionsContents
- Characteristics
- Physical properties
- Chemical properties
- Chemical compounds
- Isotopes
- History
- Occurrence
- Production
- Neutron absorber
- Alloys
- Magnetic contrast agent
- Phosphors
- Gamma ray emitter
- Electronic and optical devices
- Electrolyte in fuel cells
- Magnetic refrigeration via magnetocalorics
- Superconductors
- Asthma treatment
- Niche and former applications
- Safety
- Biological use
- Notes
- References
- External links
Gadolinium is a chemical element; it has symbol Gd and atomic number 64. It is a silvery-white metal when oxidation is removed. Gadolinium is a malleable and ductile rare-earth element. It reacts with atmospheric oxygen or moisture slowly to form a black oxide coating. Gadolinium below its Curie point of is ferromagnetic, with an attraction to a magnetic field higher than that of nickel. Above this temperature it is the most paramagnetic element. It is found in nature only in an oxidized form. When separated, it usually has impurities of the other rare earths because of their similar chemical properties.
Gadolinium was discovered in 1880 by Jean Charles de Marignac, who detected its oxide by using spectroscopy. It is named after the mineral gadolinite, one of the minerals in which gadolinium is found, itself named for the Finnish chemist Johan Gadolin. Pure gadolinium was first isolated by the chemist Félix Trombe in 1935.