Typical Uses  Coatings for ceramics, glasses and quartz, to facilitate joining operations; Cryogenic and hard vacuum applications; Used in manufacture of thermal fuses and solders; Hardening and/or strengthening alloying element.
In the UE Critical list? Yes
In the US Critical list? Yes
Embodied Energy, Primary Production  2720 – 3000 MJ/kg
Recycle? Yes