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Figure 1 The asymmetric unit in (I) with atom-labelling scheme. Some symmetry-related O atoms are included to show the full coordination polyhedra around the Co and As atoms. Displacement ellipsoids are drawn at the 50% probability level [Symmetry codes: (i) x, −y + 1, z; (ii) −x, −y + 1, −z; (iii) −x, y, −z; (iv) x − , y − , z]. |