Page is outdated and a duplicate. see Neptunium (Np)
Neptunium is an ore that can be found on protocyte worlds (and several other biome types) and smelted into Neptunium rods in a fission furnace. It appears as a light purple ore similar to sulfur in appearance.
It requires three ores to craft into a rod.
Is also a fuel, each ore is 30 units.