… Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals. …
Explanatory notes
… ‑ Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals. … heading also covers compounds derived directly by chemical treatment from mixtures of the elements. This means that the … for example, cover a mixture of europium and samarium nitrates with the oxalates nor a mixture of cerium chloride …