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Figure 3
Cavity (left) and hydrogen-bonding linkages (right) in tetra­wickmanite. (a) Wickmanite-like cavity with isolated four-membered ring motif O3—H5⋯O3 and linkages O1—H1⋯O1 at the top and bottom of the cavity. (b) Sets of <100> crankshaft-type motifs with the isolated four-membered rings lining in the plane perpendicular to the c axis. Yellow, grey and red spheres represent Mn, Sn and O atoms. Blue, purple, pink, aqua­marine and orange spheres represent H1, H2, H3, H4 and H5 hydrogen atoms, respectively.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 71| Part 2| January 2015| Pages 234-237
doi:10.1107/S2056989015001632
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