Gadolinium is a chemical element that has the symbol Gd and atomic number 64.

Gadolinium is a silvery-white, malleable and ductile rare-earth metal with a metallic lustre. It crystallizes in hexagonal, close-packed alpha form at room temperature, but, when heated to 1508 K or more, it transforms into its beta form, which has a body-centered cubic structure.

Unlike other rare earth elements, gadolinium is relatively stable in dry air. However, it tarnishes quickly in moist air, forming a loosely-adhering oxide which spalls off, exposing more surface to oxidation. Gadolinium reacts slowly with water, and is soluble in dilute acids.

Gadolinium-157 has the highest thermal neutron capture cross-section of any known nuclide with the exception of xenon-135, 49,000 barns, but it also has a fast burn-out rate, limiting its usefulness as a nuclear control rod material.[2]

Gadolinium is strongly paramagnetic at room temperature, and exhibits ferromagnetic properties below room temperature.

Gadolinium demonstrates a magnetocaloric effect whereby its temperature increases when it enters a magnetic field and decreases when it leaves the magnetic field. The effect is considerably stronger for the gadolinium alloy Gd5(Si2Ge2) .

Source: Wikipedia

The term "gadolinium" was found in the following pages:

EVISA Brfief Summary: The role of elemental speciation in legislation
Link database: Austria: University of Vienna: Institute of Inorganic Chemistry: Working group of B. Keppler
European Medicines Agency recomments to pull linear Gadolinium-based MRI contrast agents from market | EVISA's News
Isobaric dilution analysis: a new calibration strategy for long lived radionuclides | EVISA's News
Speciation analysis of gadolinium retained in the rat brain after administration of gadolinium-based contrast agents | EVISA's News
Fast and Automated Monitoring of Gadolinium-based Contrast Agents in Surface Waters | EVISA's News
Link database: DrugBank: Gadoversetamide
Atomic Spectroscopy Virtual Symposium "C is for Chromatography'' | EVISA's Agenda of Events
Link database: Gadolinium Toxicity
Material database: Institute of Nuclear Chemistry and Technology (INCT/ICHTJ) - CTA-FFA-1 FINE FLY ASH
Material database: National Analysis Center for Iron & Steel (NACIS) - NCS ZC73036 - Trace Elements in Green Tea
FDA identifies no harmful effects to date with brain retention of gadolinium-based contrast agents for MRIs | EVISA's News
Material database: American Elements - Gadolinium 160 Oxide Isotope
Link database: Chemical Fact Sheet: Yttrium
Tracing Gadolinium-based Contrast Agents from Wastewater, via Surface Water to Drinking Water | EVISA's News
Scientific publications with participation of EVISA | EVISA's News
Speciation analysis of Gadolinium-based contrast agents using hydrophilic interaction liquid chromatography hyphenated with inductively coupled plasma-mass spectrometry by avoiding organic solvents | EVISA's News
Group 2 gadolinium-based contrast agents seem to be safe even for patients with chronic kidney disease | EVISA's News
Material database: National Analysis Center for Iron & Steel (NACIS) - NCS ZC73014 - Trace Elements in Tea
Material database: National Analysis Center for Iron & Steel (NACIS) - NCS ZC73013 - Trace Elements in Spinach