Crystal structure of bis(4,4'-bipyridinium) bis(imidazolium) hexanitratostrontium(II) bis(imidazolate) — imidazole —water (1:2:1), [C10H10N2]2[C3H5N2]2[Sr(NO3)6][C3H3N2]2 · 2C3H4N2 · H2O - Bi Wenyan; Guanghua Li; Xue Qing; Huo Yu; Wang Gaopeng (Zeitschrift für Kristallographie - New Crystal Structures, 2011)