Lead

Lead is decomposed soulsand, yet very useful. It can be used to create most of the fusion reactor in MineChem.

By decomposing the soul sand, you will get a few other elements along with the lead, but its definitely the way to go.

Usage
Lead is used in crafting a Chemical Storage and Fusion Walls. It also can be placed in a fission chamber to produce Niobium.

There is not a 100% chance that lead will appear when produced via soulsand decomposition. It will take some time to get a lot of the material needed.