Signifies that one or more “continuum” orbitals should be added to the calculation. VIRTUAL and DVIRTUAL specify one or two orbital which should be initially unoccupied (in the SCF calculation), while OCCUPIED and DOCCUPIED specify one or two orbitals which should be initially occupied.
- Type: string
- Possible Values: NONE, VIRTUAL, DVIRTUAL, OCCUPIED, DOCCUPIED
- Default: NONE
