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Figure 1 (a) View of a YO7 layer in the Y2GeO5 structure (ab projection). YO7 polyhedra are represented in medium slate blue while GeO4 tetrahedra are represented in yellow. (b) View of the Y2GeO5 structure (ac projection). The layers formed by YO7 polyhedra are linked together by GeO4 tetrahedra. (c) Chains of YO6 octahedra (in gray) undulating along the c axis sharing common edges and linked with other chains by mean of GeO4 tetrahedra. (d) Unit cell for Y2GeO5 structure. |