Foundations of Crystallography

 

Acta Cryst. (2009). A65, 1-4  [ doi:10.1107/S0108767308031280 ]

Detection and characterization of ultra-thin films with neutron reflectometry

Z. Tun

Synopsis: The mystery of observing films that are much thinner than the resolution limit of a reflectivity measurement is explained within the bounds of the kinematic approximation. Although never encountered in crystal structure determination (hence it is not widely known and even seems counter-intuitive to crystallographers), the phenomenon is in no way limited to reflectometry, which could not be described without invoking dynamic scattering theory.

Online 5 November 2008

 

Acta Cryst. (2009). A65, 5-17  [ doi:10.1107/S0108767308031437 ]

Computation and parametrization of the temperature dependence of Debye-Waller factors for group IV, III-V and II-VI semiconductors

M. Schowalter, A. Rosenauer, J. T. Titantah and D. Lamoen

Synopsis: The Debye-Waller factors of group IV, III-V, and II-VI semiconductors are calculated from ab initio force constants and fitted in the temperature range from 0.1 to 1000 K.

Online 6 November 2008

 

Acta Cryst. (2009). A65, 18-27  [ doi:10.1107/S0108767308036222 ]

Abelianization of space groups

J. G. Ratcliffe and S. T. Tschantz

Synopsis: Tables of the abelianizations of all the n-dimensional space groups for n = 1, 2, 3 are provided. The exponent of the torsion subgroup of the abelianization of an arbitrary n-dimensional space group is shown to divide the order of its point group.

Online 18 November 2008

 

Acta Cryst. (2009). A65, 28-38  [ doi:10.1107/S0108767308032728 ]

Two-wavelength inversion of multiply scattered soft X-ray intensities to charge density

J. C. H. Spence

Synopsis: Multiple-scattering artifacts in soft X-ray diffraction can be completely removed using diffraction patterns recorded at two wavelengths.

Online 2 December 2008

 

Acta Cryst. (2009). A65, 39-45  [ doi:10.1107/S0108767308038130 ]

Dynamic Newton-gradient-direction-type algorithm for multilayer structure determination using grazing X-ray specular scattering: numerical simulation and analysis

F. N. Chukhovskii

Synopsis: In addition to the diverse parameter-retrieval algorithms commonly used for multilayer structure determination, a dynamic Newton-gradient-direction-type algorithm is proposed. It works well and provides the absolute minimum of the error functional even when the initial values of the search parameters are rather far from the true ones.

Online 2 December 2008

 

Acta Cryst. (2009). A65, 46-47  [ doi:10.1107/S0108767308029772 ]

On the determination of fiber tilt angles in fiber diffraction

N. Stribeck

Synopsis: The analytical solution of the tilt-angle determination problem in fiber diffraction is presented.

Online 5 November 2008

 

Acta Cryst. (2009). A65, 48-50  [ doi:10.1107/S010876730802936X ]

Deconvolution of the interatomic vector set using a convolution table

J. Feng

Synopsis: A new method for the deconvolution of the interatomic vector set is presented.

Online 5 November 2008

 

Acta Cryst. (2009). A65, 51  [ doi:10.1107/S010876730802850X ]

Powder Diffraction. Theory and Practice

Online 12 December 2008

 

Acta Cryst. (2009). A65, 52-75  [ doi:10.1107/S0108767308024136 ]

Report of the Executive Committee for 2007

Online 2 December 2008

 

Acta Cryst. (2009). A65, 76-80  [ doi:10.1107/S0108767308035587 ]

Notes for authors 2009

Online 12 December 2008