Explanatory notes
… alloys (e.g., anti‑friction alloys). Because of its great affinity for other elements, it is also used, inter alia , … gravity 0.97) with a metallic lustre, readily tarnishing after cutting. It is preserved in mineral oil or in airtight … (rare‑earth phosphate) or thorite (rare‑earth silicate), after the removal of thorium. Cerium is obtained by …
