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Macromolecular dictionary (mmCIF) version 2.0.09

_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^ + f~i~^2^) ]^1/2^

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

          the sum is taken over each atom in the unit cell

Type: int

Mandatory item: no

Alias:
_exptl_crystal_F_000 (cif_core.dic version 2.0.1)
The permitted range is [1, infinity)

Category: exptl_crystal