Does priority for isolating metallic aluminum belong to Hans Christian Orsted, whose 1825 sample was first but impure and never fully confirmed, or to Friedrich Wohler, whose 1827 sample was purer and better documented?

Orsted's 1825 method was not fully published or independently repeated at the time, while Wohler's 1827 work is the first isolation historians can verify in detail; whether "first isolation" should credit priority in time or the first confirmable result is a genuine, unresolved editorial question, not a missing fact.