[IUCr Home Page] [CIF Home Page]

Index

Core dictionary (coreCIF) version 2.4

_exptl_crystal_F_000

Name:
'_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
The permitted range is 0.0 -> infinity

Type: numb

Category: exptl_crystal