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löllingite

löllingite Min.
  (ˈlœlɪŋgaɪt)
  [Named by Hardinger, 1845, f. name of Lölling, Hüttingberg, Carinthia, its locality.]
  Arsenide of iron, found in brilliant crystals.

1849 J. Nicol Min. 453 Lölingite. 1892 Dana Min. (ed. 6) 97 Löllingite occurs with siderite.

Oxford English Dictionary

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