… Compounds, inorganic or organic, of rare-earth metals, of yttrium or of …
Explanatory notes
… 28.46 ‑ Compounds, inorganic or organic, of rare-earth metals, of yttrium or of … praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, … the same anion (e.g., rare‑earth metal chlorides), but not mixtures of salts having different anions, whether or …