鋰 (radical 167, 金+7, 15 strokes, cangjie input 金田土 (CWG), four-corner 86114, composition ⿰金里)
Phono-semantic compound (形聲): semantic 金 (“metal”) + phonetic 里.
Borrowed from New Latin lithium.
(uncommon “Hyōgai” kanji)
The リチウム (richiumu) reading for this kanji appears to be vanishingly rare, and actual use of this character for this reading cannot currently be confirmed. This might be limited to contexts discussing Chinese-language chemistry terminology.
鋰 • (ri) (hangeul 리, McCune–Reischauer ri, Yale li)