title: A new interpretation of the σA parameter.
abstract: A new study of the σA parameter has been undertaken to understand its behaviour when the diffraction amplitude distributions are far from the standard Wilson distributions. The study has led to the formulation of a new statistical interpretation of σA, expressed in terms of a correlation factor. The new formulas allow a more accurate use of σA in electron-density modification procedures.
authors.affiliation: Istituto di Cristallografia, CNR, Via Amendola 122/o, Bari, Italy.
authors.forename: B
authors.initials: B
authors.lastname: Carrozzini
authors.forename: G L
authors.initials: GL
authors.lastname: Cascarano
authors.forename: C
authors.initials: C
authors.lastname: Giacovazzo
authors.forename: A
authors.initials: A
authors.lastname: Mazzone
keywords: correlation factors; joint probability distribution approach; structure-factor distributions; σA estimate