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Figure 1 View at the square antiprism [PrO4Br4]9– with two different Br− caps in matlockite-type PrOBr. Displacement ellipsoids are drawn at 90% probability level. Symmetry codes: (i) −x + 1, −y, −z; (ii) x − 1, y, z; (iii) −x + 1, −y + 1, −z; (iv) −x + 1, −y + 1, −z + 1; (v) −x, −y, −z + 1; (vi) −x, −y + 1, −z + 1; (vii) −x + 1, −y, −z + 1; (viii) x, y, z − 1. |