Frequency statistical method for evaluating cosine invariants of three-phase relationships.

  • David A. Langs
  • Published 1993 in
    Acta crystallographica. Section A, Foundations of…

Abstract

A new variation on the established procedure to evaluate three-phase structure invariants through quadrupole relationships is described. This method differs from earlier algebraic formulations in that the cosine-invariant estimates are based on a conditional observed frequency distribution of magnitude of E magnitudes for the quadrupole, rather than on the values of the magnitudes themselves. Successful applications of this method to a number of structures that ranged in size from 84 to 317 independent non-hydrogen light atoms are given.

Cite this paper

@article{Langs1993FrequencySM, title={Frequency statistical method for evaluating cosine invariants of three-phase relationships.}, author={David A. Langs}, journal={Acta crystallographica. Section A, Foundations of crystallography}, year={1993}, volume={49 ( Pt 3)}, pages={545-57} }