No, lithium in gt6 is not rare. I got 11 stacks of lithium chloride from tungstate. Now I’m still thinking about how to fucking dispose of them, because I don’t need so many lithium batteries at all.
To tell you the truth, you only need one tungstate bedrock vein to have infinity lithium (I didn’t even find the bedrock vein. I only dug two tungsten veins to get so much lithium)
In addition, it is too slow to produce tritium by centrifuging water. It will take you a long time to get tritium enough to recover the energy cost of starting deuterium-tritium fusion, unless you have a large centrifuge array, but this means processing a large amount of tungsten and producing a large amount of lithium…
Edited on four month later:Thanks to @Erik3003 , he added lithium-6 breeder rods to proliferate tritium and rebalance the reactor