About: dbpedia-fr:Coltan     Goto   Sponge   NotDistinct   Permalink

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  • Coltan (fr)
  • Coltan (an)
  • Coltan (ca)
  • Coltan (nl)
  • Coltán (es)
  • Koltan (eu)
  • Koltan (pl)
  • Колтан (uk)
  • 钶钽铁矿 (zh)
rdfs:comment
  • Le coltan (mot-valise pour colombite-tantalite) est un minerai de couleur noire ou brun-rouge dont on extrait le niobium (d'abord appelé colombium) et le tantale. Il est formé par l'association de deux minéraux, la colombite (ou columbite) [(Fe, Mn)Nb2O6] et la tantalite [(Fe, Mn)(Ta, Nb)2O6], en proportion variable. (fr)
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