Molecular structures in the solid state of 3 (c), as determined by X-ray crystallography. The thermal ellipsoids are set at the 30% level. Hydrogen atoms, second disorder components and solvate molecules are omitted, and selected fragments are shown in wireframe format for clarity. The selected bond lengths and angles for 3 are: Ca–F 2.182(1) and 2.187(1) A and Ca–F–Ca 166.9(1)°.
