The electron-domain geometry of the asf5 molecule is trigonal bipyramidal. the hybrid orbitals used by the as atom for bonding are orbitals.

Sp3  orbital  is the  one  used  as  atom  for  bonding  by  as. In this the  trigonal  bipyramidal  the  electron  domain geometry  electron  domain available are 5  for F  . This  could  be  made  possible when  sp3d  set of  hybrid  orbital  is  available  on  the  central  atom