Acta Crystallographica Section A

Foundations of Crystallography

Volume 69, Part 4 (July 2013)



[Issue Author Index][Volume Author Index]
[Cover illustration] Cover illustration: Colorings of tilings can be used to model crystals and shed light on their structures. Colorings corresponding to index-12 torsion-free subgroups of the hyperbolic crystallographic group *32[infinity] are shown [Provido et al. (2013). Acta Cryst. A69, 445-451].

research papers


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Acta Cryst. (2013). A69, 365-373  [ doi:10.1107/S0108767313006016 ]

Three-dimensional single-particle imaging using angular correlations from X-ray laser data

H. Liu, B. K. Poon, D. K. Saldin, J. C. H. Spence and P. H. Zwart

Synopsis: Ab initio model reconstruction from fluctuation X-ray scattering data is described.

Online 8 May 2013


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Acta Cryst. (2013). A69, 374-387  [ doi:10.1107/S0108767313005990 ]

Incommensurate crystallography without additional dimensions

P. Kocian

Synopsis: By using Lie group theory, the symmetry of displacively modulated structures may be described in the usual three-dimensional space. Moreover, when calculating the Fourier transform of such crystals, the structure factor may be clearly exhibited without requiring additional dimensions.

Online 17 May 2013


 

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Acta Cryst. (2013). A69, 388-395  [ doi:10.1107/S0108767313007538 ]

Tabulation of irreducible representations of the crystallographic space groups and their superspace extensions

H. T. Stokes, B. J. Campbell and R. Cordes

Synopsis: A tabulation of complete irreducible representations at all k points of three-dimensional crystallographic space groups and their extensions to (3 + d)-dimensional superspace groups is presented.

Online 8 May 2013


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Acta Cryst. (2013). A69, 396-407  [ doi:10.1107/S0108767313009549 ]

Application of [delta] recycling to electron automated diffraction tomography data from inorganic crystalline nanovolumes

J. Rius, E. Mugnaioli, O. Vallcorba and U. Kolb

Synopsis: The tolerance of [delta] recycling phases to missing data-collection corrections and to deviations from kinematical behaviour of electron ADT intensities is analysed in detail. It has been found that Wilson-plot scaling is largely insensitive to sample thickness variations and missing absorption corrections.

Online 15 May 2013


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Acta Cryst. (2013). A69, 408-412  [ doi:10.1107/S010876731300768X ]

A new interpretation of the [sigma]A parameter

B. Carrozzini, G. L. Cascarano, C. Giacovazzo and A. Mazzone

Synopsis: A new statistical interpretation of the [sigma]A parameter is provided.

Online 15 May 2013


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Acta Cryst. (2013). A69, 413-426  [ doi:10.1107/S0108767313008738 ]

Inferring planar disorder in close-packed structures via [epsilon]-machine spectral reconstruction theory: examples from simulated diffraction patterns

D. P. Varn, G. S. Canright and J. P. Crutchfield

Synopsis: [epsilon]-Machine spectral reconstruction theory, a method for finding planar disorder in close-packed structures, is applied to four simulated diffraction patterns.

Online 17 May 2013


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Acta Cryst. (2013). A69, 427-434  [ doi:10.1107/S0108767313010143 ]

Digital electron diffraction - seeing the whole picture

R. Beanland, P. J. Thomas, D. I. Woodward, P. A. Thomas and R. A. Roemer

Synopsis: Computer control of beam tilt and image capture allows the collection of electron diffraction patterns over a large angular range, without any overlap in diffraction data and from a region limited only by the size of the electron beam. This results in a significant improvement in data volumes and ease of interpretation.

Online 21 May 2013


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Acta Cryst. (2013). A69, 435-439  [ doi:10.1107/S0108767313010325 ]

Symmetry group of two special types of carbon nanotori

M. D. Staic and A. Petrescu-Nita

Synopsis: The symmetry group of two special types of carbon nanotori is studied using a group-theoretical result.

Online 22 May 2013


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Acta Cryst. (2013). A69, 440-444  [ doi:10.1107/S0108767313011926 ]

Nonequivalent periodic subsets of the lattice

W. Cocke

Synopsis: A technique to calculate the number of nonequivalent subsets of a lattice subject to periodic boundary conditions is presented.

Online 5 June 2013


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Acta Cryst. (2013). A69, 445-451  [ doi:10.1107/S010876731301283X ]

On subgroups of crystallographic Coxeter groups

E. D. B. Provido, M. L. A. N. De Las Peñas and R. P. Felix

Synopsis: A method is presented that will facilitate the determination of the subgroup structure of crystallographic Coxeter groups, including determining torsion-free subgroups.

Online 18 June 2013


essays


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Acta Cryst. (2013). A69, 452-456  [ doi:10.1107/S0108767313006508 ]

Primo Levi, William Henry Bragg and the atomic theory of matter

D. Viterbo

Synopsis: Sir W. H. Bragg was an outstanding teacher capable of exciting the minds of intelligent young people and addressing them to science in general and chemistry in particular. Both Primo Levi, a well known Italian writer, and Dorothy Hodgkin, Nobel laureate for her pioneering work in crystallography, decided that they would become chemists after reading, at the age of sixteen, Bragg's book Concerning the Nature of Things.

Online 8 May 2013


book reviews


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Acta Cryst. (2013). A69, 457-458  [ doi:10.1107/S0108767313006624 ]

Crystallography - An Introduction

Online 18 June 2013


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