MAXRD SYMBOL

ExtinctionLength

ExtinctionLength[crystal,{h,k,l}]
calculates the extinction distance of the hkl reflection for crystal at the stored wavelength.

ExtinctionLength[crystal,λ,{h,k,l}]
calculates the extinction distance of the hkl reflection for crystal at wavelength λ.

ExtinctionLength[crystal,λ,{{h1,k1,l1},{h2,k2,l2},…}]
calculates the extinction distance of the hkli reflections for crystal at wavelength λ.

ExtinctionLength[crystal,λ,{h,k,l},γo,γh]
calculates the extinction distance of the hkl reflection for crystal at wavelength λ, using the factors and of the experimental setup.

Details and OptionsDetails and Options

  • The quantity is called Pendellösung distance in the transmission geometry, and extinction length in the reflection geometry. It is calculated from equation (4.26) [Authier, 2001]:
    • Click for copyable input
  • The symbols represent the following:
  • Pendellösung distance (or extinction length)
    unit cell volume
    cosine of the angle between the inward normal of the crystal surface and the incident direction
    cosine of the angle between the inward normal of the crystal surface and the reflected direction
    classic electron radius
    wavelength
    polarisation factor
    structure factor associated with reciprocal lattice node
    structure factor associated with reciprocal lattice node
  • Note: If the and factors are not part of the input, the geometrical factor will be omitted from the calculation of . The user will have to multiply by this factor manually at a later point.
  • Options:
  • "Polarisation""π"π () or σ () polarisation
    "Units"Truewhether to return output as Quantity