junckeriteMin.|ˈdʒʌŋkəraɪt, ˈjʊŋ-| [Named 1834, after Juncker, director of the mine where it was found: see -ite.] A synonym of siderite. 1865–72Watts Dict.Chem. III. 444 Junkerite, spathic iron ore.1868Dana Min. (ed. 5) §725 Junckerite..proved to be only common spathic iron.