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ICI7 does not exist while IF7 exist. Why...

`ICI_7` does not exist while `IF_7` exist. Why ?

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`I Cl_7` does not exist because of stearic factors, although iodine can accommodate seven F atoms to form pentagonal bipyramidal `IF_7`. But it cannot accommodate seven large size Cl atoms. Therefore it does not form `I Cl_7`.
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    B
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