XeOF5- - Xenon oxide pentafluoride anion
Xe has 8 valence electrons plus 1 for each Xe-F 2 for the Xe=O plus one for the charge
Total = 16 electrons, 1 four electron domain and 6 two electron domains
Geometry is based on a pentagonal bipyramid with one site occupied by the lone
Point group C5v
Contrast this with IF6- and BrF6-