Foundations of Crystallography

 

Acta Cryst. (2002). A58, 1-3  [ doi:10.1107/S0108767301014908 ]

Clifford Glenwood Shull 1915-2001

R. M. Moon and H. G. Smith

Synopsis: Obituary of Clifford G. Shull

Online 20 December 2001

 

Acta Cryst. (2002). A58, 4-11  [ doi:10.1107/S0108767301013800 ]

Orbital ordering in LaMnO₃: estimates of structure factors and comparison of measurement methods

B. Jiang, J. M. Zuo, Q. Chen and J. C. H. Spence

Synopsis: The orbital ordering effect of the Mn²⁺ ion on the structure factors of an LaMnO₃ crystal have been calculated. Lower-order structure-factor measurement methods such as Bragg X-ray and the QCBED method are discusssed and compared.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 12-20  [ doi:10.1107/S0108767301014957 ]

Concerning intensity profiles

E. Rossmanith

Synopsis: Kinematical intensity profiles are compared with dynamical, as well as extinction-corrected, intensity distributions. Primary-extinction correction factors are discussed.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 21-26  [ doi:10.1107/S0108767301014714 ]

A new interpretation and practical aspects of the direct-methods modulus sum function. VIII

J. Rius, X. Torrelles, C. Miravitlles, J. M. Amigó and M. M. Reventós

Synopsis: Thanks to a new interpretation of the direct-methods modulus sum function, its relation to other existing phase-refinement functions can be easily visualized. The behaviour of the modulus sum function has been optimized by analysing the effect of the two most important control parameters on a selection of test structures.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 27-32  [ doi:10.1107/S0108767301015173 ]

Lattice-parameter determination from the interaction of short femtosecond laser pulses with crystalline solids

R. Ondarza-Rovira

Synopsis: Lattice parameters are determined from harmonic emission reflected from crystalline targets irradiated by short femtosecond laser pulses.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 33-41  [ doi:10.1107/S0108767301015963 ]

Multiple diffraction data analysis for macromolecular crystals in stereoscopic multibeam imaging

C.-H. Chao, C.-Y. Hung, Y.-S. Huang, C.-H. Ching, Y.-R. Lee, Y.-C. Jean, S.-C. Lai, Y. P. Stetsko, H. Yuan and S.-L. Chang

Synopsis: A detailed analysis of multiple diffraction data collected by the stereoscopic multibeam imaging technique from a tetragonal lysozyme crystal is reported. The proposed procedures provide a practical way of reconstructing diffraction profiles for experimental phase determination for macromolecular crystals.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 42-46  [ doi:10.1107/S0108767301015537 ]

A guided simulated annealing method for crystallography

C. I. Chou and T. K. Lee

Synopsis: A new optimization algorithm, the guided simulated annealing method, for use in X-ray crystallographic studies is presented.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 47-53  [ doi:10.1107/S0108767301016609 ]

Algebraic determination of generating functions for coordination sequences in crystal structures

J.-G. Eon

Synopsis: Topological properties of the geodesics of a net allow an algebraic calculation of the generating function for its coordination sequences.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 54-59  [ doi:10.1107/S0108767301016221 ]

Experimental study on the correlation lengths of the statistical dynamical theory of X-ray diffraction by measurements of integrated intensities from silicon crystals with dislocations

D. Sakaki and T. Takama

Synopsis: Analysis of X-ray integrated intensities measured as a function of crystal thickness revealed that the two correlation lengths in the theory are absolutely required to interpret the variations of the intensities. It is shown that X-ray diffraction is more sensitive to the two correlation lengths than -ray diffraction.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 60-65  [ doi:10.1107/S0108767301016658 ]

Algorithms for deriving crystallographic space-group information. II. Treatment of special positions

R. W. Grosse-Kunstleve and P. D. Adams

Synopsis: Algorithms for the treatment of special positions in three-dimensional crystallographic space groups are presented.

Online 20 December 2001

    

Acta Cryst. (2002). A58, 66-71  [ doi:10.1107/S0108767301016579 ]

Normal-mode analysis of the structures of perovskites with tilted octahedra

C. N. W. Darlington

Synopsis: An analysis of the normal modes of vibration of a cubic perovskite that have condensed out to produce phases with tilted octahedra is presented. A Landau expansion of the excess free energy is presented involving the seven distinct modes found in the possible structures.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 72-74  [ doi:10.1107/S0108767301016476 ]

On the use of low-resolution data for translation search in molecular replacement

A. Fokine and A. Urzhumtsev

Synopsis: The inclusion of low-resolution reflections and taking into account a bulk-solvent correction improves drastically the signal in molecular replacement searches for the molecular position.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 75-76  [ doi:10.1107/S0108767301016725 ]

Latent symmetry

D. B. Litvin and V. K. Wadhawan

Synopsis: A theorem is introduced and applied to determine the latent symmetry of composite systems.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 77-78  [ doi:10.1107/S0108767301017688 ]

A simple isohedral tiling of three-dimensional space by infinite tiles and with symmetry Iad

O. Delgado Friedrichs, J. Plévert and M. O'Keeffe

Synopsis: A simple tiling of Euclidean space by infinite tiles with all hexagonal faces is described and related to a dense cylinder packing with symmetry Iad. Some related structures with the same symmetry are also described.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 79  [ doi:10.1107/S0108767301016713 ]

Nomenclature of magnetic, incommensurate, composition-changed morphotropic, polytype, transient-structural and quasicrystalline phases undergoing phase transitions. II. Report of an IUCr Working Group on Phase Transition Nomenclature. Erratum

J.-C. Tolédano, R. S. Berry, P. J. Brown, A. M. Glazer, R. Metselaar, D. Pandey, J. M. Perez-Mato, R. S. Roth and S. C. Abrahams

Synopsis: Erratum to Acta Cryst. (2001), A57, 614-626.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 79  [ doi:10.1107/S0108767301018372 ]

Diffraction physics. Erratum

A. Authier and C. Malgrange

Synopsis: Erratum to Acta Cryst. (1998), A54, 806-819.

Online 20 December 2001

 

Acta Cryst. (2002). A58, 80-116  [ doi:10.1107/S0108767301021110 ]

Report of the Executive Committee for 2000

Online 20 December 2001

 

Acta Cryst. (2002). A58, 117  [ doi:10.1107/S0108767301015720 ]

Crystals, defects and microstructures, modeling across scales

Online 20 December 2001

 

Acta Cryst. (2002). A58, 117-118  [ doi:10.1107/S0108767301016117 ]

The basics of crystallography and diffraction

Online 20 December 2001

 

Acta Cryst. (2002). A58, 118  [ doi:10.1107/S0108767301015719 ]

Chirality in liquid crystals

Online 20 December 2001

 

Acta Cryst. (2002). A58, 119-124  [ doi:10.1107/S0108767301019444 ]

Notes for Authors

Online 20 December 2001