U4O9: atoms in general sites giving the hkl extinctions of special sites

U4O9: atoms in general sites giving the hkl extinctions of special sites

In U4O9, most of the atoms are in general 48‐fold [48(e)] sites of the space group I3d and yet the hkl reflections obey the extinction rules for atoms occupying special 12‐fold [12(b)] sites. An explanation is given for this effect, which can be generalized to any space group.

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Veröffentlicht in:Acta crystallographica. Section A, Foundations of crystallography Foundations of crystallography, 2004-07, Vol.60 (4), p.318-321
Hauptverfasser: Popa, N. C., Willis, B. T. M.
Format: Artikel
Sprache:eng
Schlagworte:
special reflection conditions
systematic absences
uranium oxide
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Beschreibung
Zusammenfassung:In U4O9, most of the atoms are in general 48‐fold [48(e)] sites of the space group I3d and yet the hkl reflections obey the extinction rules for atoms occupying special 12‐fold [12(b)] sites. An explanation is given for this effect, which can be generalized to any space group.
ISSN:0108-7673
1600-5724
DOI:10.1107/S0108767304012188