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:

Material database: National Analysis Center for Iron & Steel (NACIS) - NCS ZC73013 - Trace Elements in Spinach
Link database: Chemical Fact Sheet: Curium
Material database: IRMM - Institute for Reference Materials and Measurements - ERM-CC690 - Calcareous Soil
Link database: Chemical Fact Sheet: Gadolinium
Material database: National Analysis Center for Iron & Steel (NACIS) - NCS ZC73014 - Trace Elements in Tea
Material database: Institute of Nuclear Chemistry and Technology (INCT/ICHTJ) - CTA-AC-1 APATITE CONCENTRATE
Link database: Gadolinium Toxicity
The retention of gadolinium in the human body following the use of gadolinium-based MRI contrast agents: a call to action for analytical chemists | EVISA's News
Isobaric dilution analysis: a new calibration strategy for long lived radionuclides | EVISA's News
European Medicines Agency recommends to pull linear Gadolinium-based MRI contrast agents from market | EVISA's News
Link database: RSC Periodic Table: Gadolinium
US FDA Announces Gadolinium-Based MRI Contrast Agent Warning | EVISA's News
Gadolinium speciation analysis in search for the cause of nephrogenic systemic fibrosis (NSF) | EVISA's News
Link database: Chemical Fact Sheet: Europium
Link database: DrugBank: Gadopentetate dimeglumine
Material database: United States Pharmacopeial Convention (USP) - Gadodiamide Related Compound A
Material database: American Elements - Gadolinium 156 Oxide Isotope
Material database: National Analysis Center for Iron & Steel (NACIS) - NCS ZC73012 - Trace Elements in Cabbage (NIM-GBW10014)
Incorporation of rare earth elements in the shell of freshwater mussels as an indicator for their bioavailability from polluted river water | EVISA's News
Link database: Austria: University of Vienna: Institute of Inorganic Chemistry: Working group of B. Keppler