.~.~ With scandium, yttrium, gallium, rare earth, or actinide
DEFINITION
Classification: 252/62.57
(under subclass 62.56) Compositions containing scandium, yttrium, gallium or an element from the rare earth or actinide series in chemically combined form.
(1) Note. Rare earth includes an element of the Lanthanum series, atomic numbers 57-71 inclusive.
(2) Note. Actinides includes the elements of atomic numbers 89-103.