February 2015 issue
Cover illustration: Illustration of a portion of the mixed cation/complex anion sheet structure in (I) at 100 K viewed perpendicular to (40-1) with b horizontal. The organic cation tape is shown in the center of the figure with methyl groups from the cations meeting in the centers, and rows of complex anions separating cation tapes. See Fig. 5 of Kelley et al. [(2015), Acta Cryst. B71, 48-60].