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allopalladium

allopalladium Min.
  (ˌæləʊpəˈleɪdɪəm)
  [mod. f. Gr. ἄλλος other + palladium.]
  Native palladium crystallizing under the hexagonal system.

1837–80 Dana Min. 12 Allopalladium..from Tilkerode, in the Harz, in small hexagonal tables with gold.

Oxford English Dictionary

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