Core dictionary (coreCIF) version 2.3.1

_exptl_crystal_F_000

Definition:

   The effective number of electrons in the crystal unit cell
   contributing to F(000). This may contain dispersion contributions
   and is calculated as

   F(000) = [ (sum f~r~)^2^ + (sum f~i~)^2^ ]^1/2^

   f~r~   = real part of the scattering factors at theta = 0
   f~i~   = imaginary part of the scattering factors at theta = 0

            the sum is taken over each atom in the unit cell

May appear in list containing _exptl_crystal_id

Type: numb

Category: exptl_crystal