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