I roto i te waenganui o 1885, i roto i te maina tata Freiberg, Saxony, i kitea he kohuke hou, ka huaina argyrodite no o tona ihirangi hiriwa tiketike. te chemist Clemens Winkler tātaritanga tenei kohuke hou, i kitea ki te hei te huinga o te hiriwa, te hiriwa, me te huānga hou. i taea ki te wehe Winkler te huānga hou i roto i 1886 a kitea te reira rite ki te antimony. whakaaro ia i te tīmatanga i te huānga hou ki te kia eka-antimony, engari i hohoro whakapono ia e te reira hei utu eka-silicon. i mua i Winkler whakaputaina ona hua i runga i te huānga hou, i whakatau ia e ka huaina e ia tona huānga neptunium, mai i te kitea tata o te aorangi Neptune i roto i te 1846 i rite kua mua e matapae pāngarau o tona oraraa. Heoi, i te ingoa "neptum" i mua i whakaarohia ki tetahi atu huānga i teie mahana (ahia e kore i te huānga matū hou i
te waro