Dysprosium foil, 0.25 mm, thick 99.99%

Dysprosium is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster.

D 5469 (OTTO) Dysprosium foil, 0.25 mm, thick 99.99% Cas 7429-91-6 - used as an alloying element to produce an alloy used for magnets, and as a poison in nuclear reactors where it stops the reaction from getting out of hand. The abundance in the Earth's crust of dysprosium is 6 ppm.