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gersdorffite

gersdorffite Min.
  (ˈgɜːzdɔːfaɪt)
  [Named by Löwe in 1842 after Von Gersdorf, the proprietor of the mine where it was first found.]
  A sulpharsenide of nickel.

1849 J. Nicol. Min. 459 Gersdorffite is used as an ore of nickel. 1892 Dana's Min. 90 With normal gersdorffite are classed a number of minerals.

Oxford English Dictionary

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