Per Teodor Cleve

Per Teodor Cleve ( born February 10, 1840 in Stockholm, † June 18, 1905 in Uppsala ) was a Swedish naturalist and professor.

Life and work

After having attained university entrance 1858 Cleveland began at the University of Uppsala to study mineralogy. He received his PhD in 1863 and was appointed lecturer in chemistry and agricultural chemistry. In the years 1866/67 Cleveland took a trip through England, France, Italy and Switzerland, to perform chemical and geological studies. A scholarship ( Letterstedtsk Fellow ) of the Royal Swedish Academy of Sciences in 1867 enabled him first a trip to Europe. After France and Germany Cleve eventually also toured the area around the Great Lakes in North America. From New York he traveled to the Caribbean where she investigated the geological formations of the northeastern Antilles. After his return to Sweden, he was appointed in 1870 as professor of chemistry at the Teknologiska Institutet and 1874 at the University of Uppsala.

In 1879, Cleveland discovered the rare earth holmium and thulium. He also realized that until then held for an item Didym had to be a mixture, the components were later identified as the elements neodymium and praseodymium.

From the Royal Society Cleveland was honored in 1894 with the Davy Medal, and the uranium-bearing Mineralvarietät cleveite ( uraninite, which the rare earth Y, Er and / or Ce ) was named after him.

Works

  • Om stenkol, Deras uppkomst, utbredning och betydelse 1872
  • Om korallerna och de kalkstensbildande organismernas betydelse i nativity 1873
  • Lärobok i kemi 1872-75
  • Kort lärobok i oorganisk och för kemi Organisk begynnare 1874
  • Qvalitativ Kemisk analys 1885
  • Lärobok i kemiens grunder 1886
  • Lärobok i Organisk kemi 1888
Rare earth element Didymium Yttrium Erbium Integrated Authority File
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