lanthanides (rare earth)
Lanthanoide (Seltenerdmetalle)
erbium
Erbium
ytterbium
Ytterbium
thulium
Thulium
lutetium
Lutetium
dysprosium
Dysprosium
holmium
Holmium
terbium
Terbium
samarium
Samarium
promethium
Promethium
neodymium
Neodym
praseodymium
Praseodym
cerium
Cer
gadolinium
Gadolinium
europium
Europium
lanthanum
Lanthan