Struktur atom dari amerisium dan protactinium
Konfigurasi elektron
[Rn] 5f7 7s2
[Rn] 5f2 6d1 7s2
Struktur kristal
Ganda Hexagonal Tutup Dikemas (DHCP)
Tetragonal (TETR)
kristal Lattice
DHCP-Crystal-Structure-of-Americium.jpg#100
TETR-Crystal-Structure-of-Protactinium.jpg#100
kisi Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2