What is the shape of IF6(-)? Note that it has a negative charge

Iodine(I) has 7 electrons in its valence shell, because of -1 charge it will form coordinate bond. There are 6 Flourines. Each of them will do single bond and will acqiure 8 e in outermost shell. The hybridization state can be calculating total number of sigma bonds and lone pairs. There will be 1 lone pair and 6 sigma bonds hence it will be sp3d3 shame with a lone pair. Which is distored octahedral, distorted because of a lone pair`s repulsion.