Cover illustration: The molecular structure of 1,4-bis[2-(4-ferrocenylphenyl)ethynyl]anthraquinone at 90 K from synchrotron X-ray powder diffraction. Displacement ellipsoids are drawn at the 50% probability level. See Sachiko, Nishibori, Aoyagi, Sakata, Takata, Kondo, Murata, Sakamoto & Nishihara [Acta Cryst. (2013), C69, 696-703].
The new ternary Tm2.22Co6Sn20 [a = 13.5365 (7) Å] and quaternary TmLi2Co6Sn20 [a = 13.5371 (16) Å] phases crystallize in the same cubic crystal system in the space group Fm3m and are disordered variants of the binary Cr23C6 structure type (cF116).