| Abstract: | The Crystal Structure of SrCaCrF7 By solid state reaction of the component fluorides at elevated temperature single crystals of SrCaCrF7 were obtained (a = 792.3(2), b = 724.7(2), c = 986.1(2) pm; space group Pnma, Z = 4). The X‐ray structure determination confirmed isotypism with the Ca2AlF7 type of structure: Isolated octahedra [CrF6]3— (mean Cr‐F: 189.7 pm) are opposed by infinitely netted planar cations [SrFCa2/2]3+ which contain “independent” F atoms 3‐coordinated by alkaline earth atoms only. The Sr atoms prefer (at a level of 80%) the 8‐fold, the Ca atoms the 7‐fold coordinated positions between the octahedra. |
