Hafnium is a chemical element with symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals.
(Stored under water)
H 0488 (OTTO) Hafnium sputtering target, diam. x thickness 50.6 mm x 3 mm, 99.99% - used in electronic and semiconductor application.