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Forthcoming article in Acta Crystallographica Section A Foundations and Advances



Acta Crystallographica Section A: Foundations and Advances covers theoretical and fundamental aspects of the structure of matter. The journal is the prime forum for research in diffraction physics and the theory of crystallographic structure determination



 



Diffuse single-crystal scattering corrected for molecular form factor effects
This paper shows that chemical short-range order in two-component molecular crystals can be solved directly by separating the influence of the molecular form factor.



Edge-2-transitive trinodal polyhedra and 2-periodic tilings
All trinodal, edge-2-transitive polyhedra and 2-periodic tilings are described.



The phantom derivative method when a structure model is available: about its theoretical basis
The phantom derivative phasing method has been generalized via the study of joint probability distribution functions involving the prior knowledge of a model electron-density map or of a molecular model structure.



Non-crystallographic symmetry of liquid metal, flat crystallographic faults and polymorph transformation of the M7C3 carbide
The crystal structures of M7C3, M5C2, M3C and M23C6 carbides are determined by the finite projective geometry constructions, namely the Desargues configuration 103 and its subconfigurations. The unique mechanism of the liquid-crystal transition and in situ polymorph transformations between these carbides is described within the framework of the same approach.