AM_Actinium Formula: Ac Name: Actinium Unit cell: 5.311 5.311 5.311 90.0 90.0 90.0 , V=149.81 Space group: FM3M (225)

Wyckoff R W G , Crystal Structures , 1 (1963) p.7-83, Second edition. Interscience Publishers, New York, New York, Cubic closest packed, ccp, structure