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Figure 2 Coordination spheres of the Cs1+ (left) and Cs2+ (right) cations in Cs3Sm7Se12. Displacement ellipsoids are drawn at the 90% probability level. Symmetry codes: (i) −x + , y − , z + ; (ii) −x + , y − , z − ; (iii) −x + 1, −y + 1, −z; (viii) −x + 1, −y, −z; (ix) x + , −y + , −z − ; (x) x + , −y + , −z + . |