Popa N C, Willis B T M
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research,141980 Dubna, Moscow Region, Russia.
Acta Crystallogr A. 2004 Jul;60(Pt 4):318-21. doi: 10.1107/S0108767304012188. Epub 2004 Jun 24.
In U4O9, most of the atoms are in general 48-fold [48(e)] sites of the space group I43d 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.
在U4O9中,大多数原子通常处于空间群I43d的48重[48(e)]位置,但hkl反射却遵循原子占据特殊12重[12(b)]位置时的消光规则。针对这种效应给出了一种解释,该解释可推广到任何空间群。