Explanatory notes
… Beryllium is obtained almost exclusively from beryl, a double silicate of beryllium and aluminium, which is … beryllium is used in the manufacture of windows for X‑ray tubes; as components for nuclear reactors; in the aircraft … all its forms, i.e., unwrought metal (in blocks, pellets, cubes, etc.), products (bars, rods, wire, sheets, etc.), and …
