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Figure 1
Molecular packing of the HAO crystal. In the crystal the molecules A and A′, and B and B′ are assembled. Molecules AA′ and BB′ are related by crystallographic symmetry. The `ellipsoidal' symbol represents the twofold non-crystallographic symmetry (NCS) axis that runs perpendicular to the c axis. The planes marked in black are interfaces between two molecular assemblies. If molecule CC′ moves as shown in the figure, the relationship between BB′ and CC′ cannot be distinguished from that of BB′ and AA′.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 5| Part 3| May 1998| Pages 975-976
https://doi.org/10.1107/S0909049597017962
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