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Gadolinium is a chemical element with symbol Gd and atomic number 64. It is a silvery-white, malleable and ductile rare-earth metal. It is found in nature only in combined (salt) form
G 7393 (OTTO) Gadolinium rod, dia 6.35 mm, 99.9% Cas 7440-54-2 - used in nuclear marine propulsion systems as a burnable poison.