. . "Swedish chemist" . "Arfwedson, Johan August"@en . "Johan August Arfwedson (12 January 1792 \u2013 28 October 1841) was a Swedish chemist who discovered the chemical element lithium in 1817 by isolating it as a salt."@en . "1841-10-28Z"^^ . "Johan August Arfwedson"@en . . "1792Z"^^ . . "1841Z"^^ . "1792-01-12Z"^^ . . .