libxc: libxc (exchange-correlation functionals for density-functional theory) libxc: libxc: libxc: Libxc is a library of exchange-correlation and kinetic energy libxc: functionals for density-functional theory. The original aim was libxc: to provide a portable, well tested and reliable set of these libxc: functionals to be used by all the codes of the European libxc: Theoretical Spectroscopy Facility (ETSF), but the library has libxc: since grown to be used in several other types of codes as well. libxc: libxc: