Fluorite layers

Figure 7. Schematic structure of all high systems. CuO. sheets are separated by reservoirs of other material. The latter may be rocksalt layers, fluorite layers, layers of metal atoms alone, or combinations of these.

Figure 28 Schematic drawing of single fluorite layers (a) and of double fluorite layers (b) (edge sharing AOs cubes).

Problem 3 Propose a stractural model for the oxides Bi2Sr2Ln2-xCexCu20io and Pb2Sr2LnCeCu30io which differ firom the oxides (ACu03.x)m(A 0)n by the replacement of single fluorite layers by double fluorite layers. 

Layered cuprates involving double fluorite layers... 

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