An empirical correction for absorption anisotropy

A least-squares procedure is described for modeling an empirical transmission surface as sampled by multiple symmetry-equivalent and/or azimuth rotation-equivalent intensity measurements. The fitting functions are sums of real spherical harmonic functions of even order, ylm(-u0) + ylm(u1), 2 < or...

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Bibliographic Details
Published inActa crystallographica. Section A, Foundations of crystallography Vol. 51 ( Pt 1); p. 33
Main Author Blessing, R H
Format Journal Article
LanguageEnglish
Published United States 01.01.1995
Subjects
Anisotropy
Crystallization
Crystallography
Mathematics
Software
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Summary:A least-squares procedure is described for modeling an empirical transmission surface as sampled by multiple symmetry-equivalent and/or azimuth rotation-equivalent intensity measurements. The fitting functions are sums of real spherical harmonic functions of even order, ylm(-u0) + ylm(u1), 2 < or = l = 2n < or = 8. The arguments of the functions are the components of unit direction vectors, -u0 for the reverse incident beam and u1 for the scattered beam, referred to crystal-fixed Cartesian axes. The procedure has been checked by calculations against standard absorption test data.
ISSN:0108-7673
DOI:10.1107/S0108767394005726