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  • 🇬🇧 Actinium
  • 🇺🇦 Актиній
  • 🇨🇳 錒
  • 🇳🇱 Actinium
  • 🇫🇷 Actinium
  • 🇩🇪 Actinium
  • 🇮🇱 אקטיניום
  • 🇮🇹 Attinio
  • 🇯🇵 アクチニウム
  • 🇵🇹 Actínio
  • 🇪🇸 Actinio
  • 🇸🇪 Aktinium
  • 🇷🇺 Актиний
  • Space group: Fm-3m
  • Space group number: 225
  • Structure: ccp (cubic close-packed)
  • Cell parameters:
    • a: 567 pm
    • b: 567 pm
    • c: 567 pm
    • α: 90.000°
    • β: 90.000°
    • γ: 90.000°

You may view the structure of actinium:

Actinium crystal structure image (ball and stick style)
Actinium crystal structure image (ball and stick style).
Actinium crystal structure image (space filling style)
Actinium crystal structure image (space filling style).

References

J. D. Farr, A. L. Giorgi, M. G. Bowman, and R. K. Money, J. Inorg. Nucl. Chem., 1961, 18, 42.