RI in SCF calculations

Considerable savings in CPU times are achieved with the RI technique for both Coulomb J and exchange K terms in SCF calculations, the RI-JK method [24], provided large basis sets are employed, e.g. TZVPP, cc-pVTZ, or cc-pVQZ. With rijk you get:

STATUS OF RI-OPTIONS:
    RI IS NOT USED
    Memory for RI:           200 MB
    Filename for auxbasis: auxbasis

 ENTER RI-OPTION TO BE MODIFIED
      m: CHANGE MEMORY FOR RI
      f: CHANGE FILENAME
  jkbas: ASSIGN AUXILIARY RI-JK BASIS SETS
     on: TO SWITCH ON  RI
 Use <ENTER>, q, end, or * to leave this menu

For an explanation of the menu items see Section 4.4.1. RI-JK calculations can be carried out with the program ridft.