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About
Calcium ions form an fcc array; fluoride ions fill every tetrahedral hole. Each Ca²⁺ is eight-coordinate (cubic), each F⁻ four-coordinate.
Structure
PrototypeCaF2 (C1)
Crystal systemcubic
Space groupFm-3m (225)
Latticea = 5.4626 Å
Anglesall 90°
Also crystallizes this way
UO2ZrO2 (high-T)BaF2SrF2
Sources
- Structure: Crystallography Open Database (COD)
- Lattice parameters: Wyckoff, Crystal Structures — a = 5.463 Å