Octahedral coordination of hetero-atom

The MnMogOsJ ion. The structure of a 9-ion has been determined in (NH4)6MnMo9032 8 H20. In this ion, illustrated in Fig. 11.9, nine MoO octahedra are grouped around, and completely enclose, the Mn ion. 

TheTeMosO J ion in (NH4)6(TeMo6024) -7H20, showing the mode of linking of the MoOfi octahedra. 

The structure of the MnMo9032 anion with exploded view at left. The single circles represent Mo and the double circle Mn. 

The MnNbi20 ion. This ion may be constructed from the same edge-sharing groups of three octahedra from which PW12O40 is built and which are also sub-units in MnMogOs. We may refer to the unit as A or as B if it is upside-down (Fig. 11.9). If B is placed on A there is formed an octahedral group of six octahedra which is the structure of the Nb Of ion of Fig. 11.3(a). 

The [H4C02M010O38] anion. The black ootahedra contain the Co atoms. 

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