Gadolinium is a silvery white metal element with the symbolGd of the group of rare earth metals. It is found in the mineral gadolinite. It is ferromagnetic (strongly attracted by a magnet). The metal is relatively stable in dry air, but in moist air it tarnishes with the formation of a loosely adhering oxide film which 'spalls' off and exposes more surface to oxidation. The metal reacts slowly with water and is soluble in dilute acid.
Gadolinium has the highest thermal neutron capture cross-section of any known element. Gadolinium is used for making gadolinium yttrium garnets which have microwave applications.
Gadolinium compounds are used for making phosphors for colour TV tubes. Gadolinium is also used in alloys and CD disks and has superconductive properties. Solutions of gadolinium compounds are used as intravenous contrasts to enhance images in patients undergoing MRI (magnetic resonance imaging). Research Gadolinium
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Gadolinium
