The rare-earth elements and their compou
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R.H. Oppermann
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Article
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1948
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Elsevier Science
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English
β 80 KB
Including lanthanum, fifteen chemically similar elements between barium and hafnium on the periodic table are known as rare earth elements. This region has been the least investigated by the spectroscopists. The book at hand presents the principal chemical and physical properties of the rare earth e