| http://www.w3.org/ns/prov#value | - In the present invention, in at least one element (A) selected from the group consisting of rare earth elements, Group 3A, 3B, 4A, 4B and 6B elements of Periodic Table, iron group metals, Mn, V, alkali metals and alkaline earth metals, firstly, the rare earth elements include lanthanoids such as La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and actinoids such as Ac, Th, Pa, U, Np,
|
