Tellef Dahll

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Tellef Dahll
Tellef Dahll.jpeg
Born (1825-04-10)10 April 1825
Kragerø, Norway
Died 17 June 1893(1893-06-17) (aged 68)
Nationality Norwegian
Occupation Geologist
Awards Order of St. Olav
Order of the Polar Star

Tellef Dahll, born 10 April 1825 in Kragerø, died 17 June 1893 in Morgedal, was a Norwegian mineralogist and geologist.[1]


After graduating in minearology from the University of Christiania in 1846, Dahll worked for private mining companies. He found coal on the island of Andøya, iron ore at Bjørnevatn[2] and in 1867 Dahll discovered gold from the Tana and Anarjohka rivers, which launched the 1870 gold rush in the Finnish Lapland.[3] Since 1858 Dahll and Theodor Kjerulf led the first geological survey of Norway.[4]

In 1879 Dahll collected samples of nickel arsenide and gersdorffite on the island of Oterøya in his birthplace Kragerø. Dahll found out that the rocks contained previously unknown element which he named Norwegium.[4][5] The phosphate mineral dahllite (hydroxylapatite) is named after Tellef Dahll and his brother, the mineralogist Johann Dahll.[6]


  1. ^ Tellef Dahll Norsk Biografisk Leksikon. Retrieved 1 October 2015. (Norwegian)
  2. ^ Who We Are Sydvaranger Gruve AS. Retrieved 1 October 2015.
  3. ^ Derek Maier, Wolfgang & Lahtinen, Raimo & O'Brien, Hugh: ″Mineral Deposits of Finland″, p. 7–8. Elsevier, 2015. ISBN 978-012-41043-8-9. Google Books
  4. ^ a b Fontani, Marco & Costa, Mariagrazia & Oma, Mary Virginia: ″The Lost Elements: The Periodic Table's Shadow Side″, p. 136. Oxford University Press, 2014. ISBN 978-019-93833-4-4. Google Books
  5. ^ Hafnium Elementymology & Elements Multidict. Retrieved 1 October 2015.
  6. ^ Dahllite Medical Definition Mirriam-Webster Medical Dictionary. Retrieved 1 October 2015.