โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Praseodymium
  • ๐Ÿ‡จ๐Ÿ‡ณ ้ 
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Praseodymium
  • ๐Ÿ‡ซ๐Ÿ‡ท Praséodyme
  • ๐Ÿ‡ฉ๐Ÿ‡ช Praseodym
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ืคืจืกื™ืื•ื“ื™ืžื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Praseodimio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒ—ใƒฉใ‚ปใ‚ชใ‚ธใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Praseodímio
  • ๐Ÿ‡ท๐Ÿ‡บ ะŸั€ะฐะทะตะพะดะธะผ
  • ๐Ÿ‡ช๐Ÿ‡ธ Praseodimio
  • ๐Ÿ‡ธ๐Ÿ‡ช Praseodym

Praseodymium: historical information

  • Discoveror: Carl F. Auer von Welsbach
  • Place of discovery: Austria
  • Date of discovery: 1885
  • Origin of name : from the Greek words "prasios didymos" meaning "green twin".

In 1885, Carl Auer von Welsbach separated an "earth" called didymia obtained from the mineral samarskite into two earths, praseodymia and neodymia, which gave salts of different colours. The separation required the repeated fractionation of ammonium didymium nitrate.