CaF2 – Fluorite: Interactive 3D Structure

– Ca2+ 8 (cubic) : F 4 (tetrahedral)

 

Ca2+ with F in all Td holes

Polyhedra – Edge-sharing , edge-sharing

Cations form the cubic close packing while anions fill all tetrahedral holes.
Ca2+ ions are coordinated in cubic fashion (CN=8) while F ions are tetrahedrally coordinated (CN=4)

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Related Structure: Antifluorite (Na2O)

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