Brande also described some pure salts of lithium, such as the chloride, and, estimating that lithia (lithium oxide) contained about 55% metal, estimated the atomic weight of lithium to be around 9.8 g/mol (modern value ~6.94 g/mol).
Brande beskrev også nogle rene lithiumsalte, såsom dets klorid, og vurderede lithiums atomvægt til at være på omkring 9,8 g/mol (moderne værdi ~6,94 g/mol), idet han vurderede, at lithia (lithiumoxid) indeholdt omkring 55 % metal.