Index

Core dictionary version 3.3.0

_atom_type_scat.Cromer_Mann_a2

Definition:

   
    The set of data items used to define Cromer-Mann coefficients
    for generation of (0.0 < s < 2.0 Å^-1^) X-ray scattering factors.

    f(s) = c + Sum[a~i~ * exp(-b~i~ * s^2^), i=1:4]

    where s = sin(θ)/λ, θ is the diffraction angle and λ is the wavelength
    of the incident radiation in angstroms.

    Ref: International Tables for X-ray Crystallography (1974).
	     Vol. IV, Table 2.2B
    or   International Tables for Crystallography (2004).
	     Vol. C, Tables 6.1.1.4 and 6.1.1.5.

Type: Real

Units: none

Category:
atom_type_scat