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The title compounds, dialuminium triiron trisilicide and dialuminium triiron tetrasilicide, crystallize with new structure types. The coordination polyhedra in Fe3Al2Si3 derive from icosahedra, and those in Fe3Al2Si4 from hexagonal cuboctahedra.
Supporting information
| Crystallographic Information File (CIF) Contains datablocks FSA, Fe~3~Al~2~Si~3~, Fe~3~Al~2~Si~4~ |
| Structure factor file (CIF format) Contains datablocks FSA1, FSA2 |
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