Winkler akakwanisa kupatsanura chinhu chitsva muna 1886 uye akachiwana chakafanana ne antimony. Pakutanga akafunga kuti chinhu chitsva ichi chaive eka-antimony, asi akakurumidza kugutsikana kuti pachinzvimbo chaive eka-silicon. Winkler asati aburitsa mhedzisiro yake pachinhu chitsva, akafunga kuti achatumidza chinhu chake kuti neptunium, sezvo kuwanikwa kwazvino kwepasi reNeptune muna 1846 kwakange kwambotungamirwawo nekufungidzira kwemasvomhu kwekuvapo kwayo. Zvisinei, zita rekuti "neptum" rakange ratopihwa nhasi kuremekedza chimwe chinhu chemakemikari (kunyangwe chisina kunzi Agyrodite, sarufa, uye chinhu chitsva. Winkler akanongedza chinhu chitsva muna 1886 ndokuchiwana chakafanana ne antimony. Pakutanga akafunga kuti chinhu chitsva ichi chaive eka-antimony, asi akakurumidza kugutsikana kuti chaive eka-silicon.
neptunium