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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



 



Quasicrystals: What do we know? What do we want to know? What can we know?
The state of the art of quasicrystal research is critically reviewed. Fundamental questions that are still unanswered are discussed and experimental limitations are considered.









A one-step mechanism for new twinning modes in magnesium and titanium alloys: obliquity correction of a (58°, a + 2b) prototype stretch twin
A geometric model of {11{\overline 2}2} and {11{\overline 2}6} twinning modes in magnesium and titanium alloys is proposed.



The limit of application of the Scherrer equation
Study of the limit of applicability of the Scherrer equation that found it is approximately 11.9% of the extinction length and has a maximum value because of absorption.



Improving the convergence rate of a hybrid input–output phasing algorithm by varying the reflection data weight
It is demonstrated that, by inputting the reflection data in an incremental fashion starting with low- and medium-resolution reflections, the convergence rate of the hybrid input–output ab initio phasing algorithm can be significantly increased.



Construction of weavings in the plane
A method for constructing weavings of (mixed) overlapping nets in the plane is discussed.