The vortex rifle (not sure if it is vortex rifle or vortex gun) is missing from the en_us lang file, causing it to be called "item.gun_vortex.name"
Revision:
It's missing from all of the lang files

Same for the sodium material for the crucible im pretty sure, at least according to NEI it is :P

The gun was never even finished to begin with. The gun rework will come soon, which means it will either be completed or scrapped entirely.