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Gadolinium is a silvery-white metal when oxidation is removed. It is a malleable and ductile rare-earth element. Gadolinium reacts with atmospheric oxygen or moisture slowly to form a black coating. Gadolinium below its Curie point of 20 °C (68 °F) is ferromagnetic, with an attraction to a magnetic field higher than that of nickel.
Gadolinite is fairly rare and typically occurs as well-formed crystals. It is nearly black in color and has a vitreous luster.The hardness is between 6.5 and 7 on the Mohs scale, and the specific gravity is between 4.0 and 4.7.
Pages in category "Gadolinium compounds" The following 25 pages are in this category, out of 25 total. This list may not reflect recent changes. G. Gadolinium acetate;
Pages in category "Gadolinium" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. ...
Gadolinium isotopes have 10 metastable isomers, with the most stable being 143m Gd (t 1/2 = 110 seconds), 145m Gd (t 1/2 = 85 seconds) and 141m Gd (t 1/2 = 24.5 seconds). The primary decay mode at atomic weights lower than the most abundant stable isotope, 158 Gd, is electron capture , and the primary mode at higher atomic weights is beta decay .
Pages in category "Gadolinium minerals" This category contains only the following page. This list may not reflect recent changes. L. Lepersonnite-(Gd)
Gadolinium salts are of primary interest for relaxation agents in magnetic resonance imaging . This technique exploits the fact that Gd 3+ has an electronic configuration of f 7 . Seven is the largest number of unpaired electron spins possible for an atom, so Gd 3+ is a key component in the design of highly paramagnetic complexes. [ 6 ]
A 2015 study found gadolinium deposited in the brain tissue of people who had received gadodiamide. [8] Other studies using post-mortem mass spectrometry found most of the deposit remained at least 2 years after an injection and deposit also in individuals with no kidney issues. In vitro studies found it to be neurotoxic. [9]