Tantalates and Niobates

We have seen in the preceding Section that oxides with MCE octahedra can form perovskite structures and this trend applies to some tantatates and niobates as well. 

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Table 11. Studies on tantalate and niobate photocatalysts for the splitting of water."...

Two local developments relevant to this chapter are recorded here to update the section on rare earth tantalates and niobates and rare-earth tungstates. The latter negates much of the speculation on tungstate structures included earlier. 

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