Yttrogummite

Yttrogummite is a yttrium-bearing variety of gummite mineral. It is a rare earth mineral containing relatively large amounts of the yttrium earths. It is an alteration product of yttrian uraninite.[1]

It was first described by Adolf Erik Nordenskiöld, who discovered it in Arendal, Norway in 1870s. [2]

References
  1. Yttrogummite on Mindat.org
  2. Nordenskiöld, A.E. (1878): Mineralogiska bidrag 5. Cleveit, ett nytt yttro-uran mineral från Garta felsspatsbrott nära Arendal. Geologiska Föreningen i Stockholm Förhandlingar, 4: 28-32
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