Georges Urbain
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dysprosiumā¦other heavy lanthanides; French chemist Georges Urbain later (1906) was able to prepare a reasonably pure fraction. Some important mineral sources of dysprosium are laterite ionic clays, xenotime, fergusonite, gadolinite, euxenite, polycrase, and blomstrandine. It also occurs in the products of nuclear fission.
Read Moreā¦other heavy lanthanides; French chemist Georges Urbain later (1906) was able to prepare a reasonably pure fraction. Some important mineral sources of dysprosium are laterite ionic clays, xenotime, fergusonite, gadolinite, euxenite, polycrase, and blomstrandine. It also occurs in the products of nuclear fission.
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ytterbiumFrench chemist Georges Urbain and Austrian chemist Carl Auer von Welsbach independently demonstrated in 1907ā08 that Marignacās earth was composed of two oxides, which Urbain called neoytterbia and lutetia. The elements are now known as ytterbium and lutetium. Ytterbium is among the less-abundant rare earths. It occursā¦
Read MoreFrench chemist Georges Urbain and Austrian chemist Carl Auer von Welsbach independently demonstrated in 1907ā08 that Marignacās earth was composed of two oxides, which Urbain called neoytterbia and lutetia. The elements are now known as ytterbium and lutetium. Ytterbium is among the less-abundant rare earths. It occursā¦
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