Definition : Lanthanum. The prototypical element in the rare earth family of metals. It has the
atomic symbol La, atomic number 57, and atomic weight 138.91. Lanthanide ion is used
in experimental biology as a calcium antagonist; lanthanum oxide improves the optical
properties of glass. [MeSH];
Lanthanum. The prototypical element in the rare earth family of metals. It has the
atomic symbol La, atomic number 57, and atomic weight 138.91. Lanthanide ion is used
in experimental biology as a calcium antagonist; lanthanum oxide improves the optical
properties of glass. [MeSH]