Oh I get it! Yes they used LITHIUM 6! Thats right, and lots of lead.
As far as ingredients, in case you want to build one:
the tsar bomb was mostly LEAD! Honest! That is what they used.

and it was the most powerful bomb in the world
Yes! use lithium 6 and lead that makes the best bomb.! that would be very good thing to build.
I get it.
Im a little slow today..
And make sure you use the schematic of the teller-ulram weopon just as it appears on wikipedia, so that we will be sure it won't work! Its the same one in your encyclopedia.
lithium 6,7,8, tritium, deuterium, whatever... we dont want to be correct here that is certain.
The real problem isnt wether a insane country builds a few, there are too many nukes and that a multiwarhead triton will equal the damage of a tzar bomb or greater depends on how they set them up.
don't rest satisfied that we are now safer.