Actinium and Lutetium Periodic Table
Periodic Table
Symbol
Ac
Lu
Group Number
Not Available
Not Available
Period Number
7
6
Block
f block
f block
Element Family
Actinide
Lanthanide
CAS Number
7440348
99+
7439943
99+
Space Group Name
Fm_ 3m
P63/mmc
Space Group Number
225.00
2
194.00
5
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