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Figure 3
Projection views along a (or a′) of the unit cell of (o-Me2TTF)2NO3 at different temperatures. (a) T = 250 K. The NO3− anions are disordered between two centrosymmetric positions. (b) T = 85 K in the q1 = (0, ½, ½) superstructure. Only the majority orientation (93.5%) of the nitrate anion on atom N1A is shown for clarity. The red and blue lines parallel to the molecular long axes illustrate the rotations of the stacks taking place in this intermediate q1 = (0, ½, ½) structure to accommodate the two different NO3− orientations. (c) T = 20 K in the q1 + q2 = (½, ½, ½) superstructure.

IUCrJ
Volume 5| Part 3| May 2018| Pages 361-372
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518004967