vb: record name for VB wavefunction (default is first available record after 3200.2), i.e., orbitals and structure coefficients.
civb: record name for valence bond full CI vector defined in terms of the CASSCF MOs (default is 3300.2). Saving this vector is necessary for the calculation of further properties, geometry optimization, etc.
vbao: record name for valence bond wavefunction in the AO basis.
Note that specifying
orb in the START directive is a precondition for this
keyword. It may be useful for plotting of orbitals, or for providing a guess
to be used in the interpretation of a CASSCF solution employing a different active space.