Artificial intelligent assistant

zinckenite

zinckenite Min.
  (ˈzɪŋkənaɪt)
  Also zink-.
  [ad. G. zinkenit (G. Rose, 1826), named in honour of J. K. L. Zincken, director of Anhalt mines.]
  A steel-grey sulphide of antimony and lead.

1835 R. D. & T. Thomson's Rec. Gen. Sci. I. 272 Combinations of sulphuret of antimony and sulphuret of lead in different proportions, viz.: zinkenite,..Plagionite, Federerz, Bournonite.

Oxford English Dictionary

yu7NTAkq2jTfdvEzudIdQgChiKuccveC ac0e813ccf3127022d4f9e5206d3dbcc