Question

what is the shape of [SbF5]^2-

Answer 1

Ok assuming that this is true [SbF5] -2 it will be square pyramidal shaped
and the hybridization is sp3d2
you calculate it the following way way:
Sb has 5 valence electron+2more electron(for unit -ve charge)+5 more electron (from each F atom)=12
so steric number is 12/2=6
but here one pair of electron is present as lone pair. 
THANKS A LOT @MACTAVISH343 for helping me to answer this question

Answer 2

It’s shape is square pyramidal....