:term:`DF_SCF_GUESS <DF_SCF_GUESS (SCF)>`
"""""""""""""""""""""""""""""""""""""""""

      Use DF integrals tech to converge the SCF before switching to a conventional tech in a :term:`SCF_TYPE <SCF_TYPE (SCF)>` ``DIRECT`` calculation

      * **Type**: :ref:`boolean <op_c_boolean>`
      * **Default**: true