55Cs铯132.90556Ba钡137.3357-71La-Lu镧系57La镧139.959Ce铈140.159臀R镨140.960Nd钕144.261臀m钷(147)62SM钐150.363Eu铕151.9664Gd钆157.2565TB铽159.966Dy镝162.567推o钬164.969E...