… Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals. …
Explanatory notes
… 28.46 ‑ Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these … terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium). The heading also covers compounds derived … of oxides. The oxides of europium, samarium, etc. are used in nuclear reactors for the absorption of slow …