libxc version 7.1.2
S. Lehtola, C. Steigemann, M. J. T. Oliveira, and M. A. L. Marques,  SoftwareX 7, 1–5 (2018)
doi: 10.1016/j.softx.2017.11.002

   func_id: 1                   
      name: lda_x                    
    family: XC_FAMILY_LDA       
      kind: XC_EXCHANGE              
   comment: Slater exchange

This is a pure functional with no exact exchange.

Reference(s):
  *) P. A. M. Dirac,  Math. Proc. Cambridge Philos. Soc. 26, 376 (1930)
     doi: 10.1017/S0305004100016108
     bibtex key: Dirac1930_376
  *) F. Bloch,  Z. Phys. 57, 545 (1929)
     doi: 10.1007/BF01340281
     bibtex key: Bloch1929_545

Implementation has support for:
  *) energy
  *) first derivative
  *) second derivative

Default thresholds:
density: 1.000000e-15
   zeta: 2.220446e-16

Functional has no external parameters.
