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![[Figure 1]](yr5116fig1mag.jpg)
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Figure 1
Schematic projections of an IF2 molecule. (a) The molecule in three different orientations projected along the OZ direction chosen as opposite to the beam direction. (b) Several projections of the IF2 molecule. The numbers on each projection are its respective Euler angles in the standard convention. Seven projections, marked by white frames and corresponding to different Euler angles, are actually the same or equivalent. This is an example of an over-represented view. The three projections inside the red frame correspond to the projections in panel (a); the respective models are shown above. (c) The reference model corresponding to Euler angles (0, 0, 0) is at the origin. The magenta arrow indicates the view along OZ, as in panel (a). The red arrow indicates the view along OX and corresponding to the molecule rotated by (0, 90, 0) in panels (a) and (b). The green arrow corresponds to a view along some arbitrary direction with the spherical angles θ (with OZ) and φ (azimuthal angle). (d) A plane representation of the views from panel (c) with the position of the green point to be defined. The coordinates of the coloured points, representing the views, depend on the method of representation. The program PyMOL (Schrödinger LLC & DeLano, 2020  ) was used to produce the IF2 models. |
![[Figure 1]](yr5116fig1.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
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