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CONTENTS<br />

xiv<br />

16.9.4 Sanity check on the energy . . . . . . . . . . . . . . . . . . . . . . . . 106<br />

16.9.5 Print options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106<br />

16.9.6 Interpolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106<br />

16.9.7 Reorthonormalization of the orbitals . . . . . . . . . . . . . . . . . . . 107<br />

16.9.8 Direct SCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107<br />

17 THE DENSITY FUNCTIONAL PROGRAM 108<br />

17.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108<br />

17.2 Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109<br />

17.2.1 Density source (DENSITY, ODENSITY) . . . . . . . . . . . . . . . . 109<br />

17.2.2 Thresholds (DFTTHRESH) . . . . . . . . . . . . . . . . . . . . . . . . 109<br />

17.2.3 Exact exchange computation (EXCHANGE) . . . . . . . . . . . . . . . 109<br />

17.2.4 Rangehybrid methods (RANGEHYBRID) . . . . . . . . . . . . . . . . 110<br />

17.2.5 Exchange-correlation potential (POTENTIAL) . . . . . . . . . . . . . 110<br />

17.2.6 Grid blocking factor (DFTBLOCK) . . . . . . . . . . . . . . . . . . . . 110<br />

17.2.7 Dump integrand values(DFTDUMP) . . . . . . . . . . . . . . . . . . . 110<br />

17.3 Numerical integration grid control (GRID) . . . . . . . . . . . . . . . . . . . . 110<br />

17.3.1 Target quadrature accuracy (GRIDTHRESH) . . . . . . . . . . . . . . . 111<br />

17.3.2 Radial integration grid (RADIAL) . . . . . . . . . . . . . . . . . . . . 111<br />

17.3.3 Angular integration grid (ANGULAR) . . . . . . . . . . . . . . . . . . 112<br />

17.3.4 Atom partitioning of integration grid (VORONOI) . . . . . . . . . . . . 113<br />

17.3.5 Grid caching (GRIDSAVE, NOGRIDSAVE) . . . . . . . . . . . . . . 113<br />

17.3.6 Grid symmetry (GRIDSYM,NOGRIDSYM) . . . . . . . . . . . . . . . 113<br />

17.3.7 Grid printing (GRIDPRINT) . . . . . . . . . . . . . . . . . . . . . . . 113<br />

17.4 Density Functionals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114<br />

17.4.1 Alias density functionals . . . . . . . . . . . . . . . . . . . . . . . . . 120<br />

17.4.2 Implementing new functionals . . . . . . . . . . . . . . . . . . . . . . 121<br />

17.4.3 Implementing new hybrid-functionals . . . . . . . . . . . . . . . . . . 122<br />

17.5 Empirical damped dispersion correction . . . . . . . . . . . . . . . . . . . . . 122<br />

17.6 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123<br />

18 ORBITAL LOCALIZATION 124<br />

18.1 Defining the input orbitals (ORBITAL) . . . . . . . . . . . . . . . . . . . . . . 124<br />

18.2 Saving the localized orbitals (SAVE) . . . . . . . . . . . . . . . . . . . . . . . 124<br />

18.3 Choosing the localization method (METHOD) . . . . . . . . . . . . . . . . . . 125<br />

18.4 Delocalization of orbitals (DELOCAL) . . . . . . . . . . . . . . . . . . . . . . 125

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