Figure 2
(a) Partial structure showing Mn2O8 dimers (polyhedral drawing). The apical oxygen, O3, in each MnO5 square pyramid points in opposite directions. (b) Corner-sharing BO3 groups forming a pyroborate unit. The BO3 units within the pyroborate group are linked through a common O atom, O5. (c) The barium cation resides in a BaO9 environment. Anisotropic displacement parameters are drawn at 95% probability. |