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Figure 3 Coordination sphere of the Se2− anion. Due to the under-occupation of the neodymium site, each selenium is surrounded by 5.333 Nd3+ cations. Displacement ellipsoids are drawn at 95% probability level. [Symmetry codes: (viii) y, −z, −x + ; (ix) −x + , −y, z − ; (x) −y − , x − , −z + ; (xi) y, z, x; (xii) y + , −x + , −z + .] |