October 1996 issue
The structure of La2Cu2O5 comprises CuO5 square pyramids connected to each other in three dimensions by corner sharing and ten-coordinate La3+ ions occupying positions next to oxygen vacancies which form tunnels along the c axis.
The structure of Eu3BSi2O10 is composed of layers of isolated BSi1O65− and Si2O44− anions which alternate along the c axis. The layers are linked through three crystallographically independent Eu3+ ions to form a three-dimensional network structure.
The structure of LaMo8O14 contains an equal mixture of cis-edge-sharing and trans bi-face-capped octahedral Mo8 clusters arranged in layers. The O-atom framework derives from close packing with an ABAC⋯ layer sequence. The La3+ ions are surrounded by 12 O atoms forming a distorted cuboctahedron.