Journal of Applied Crystallography

Volume 38, Part 5 (October 2005)



[Issue Author Index][Volume Author Index]
[Cover illustration] Cover illustration: Secondary electron image of a crystalline iron ore sinter phase, produced by heating to 1533 K and then cooling. Courtesy of N. V. Y. Scarlett, I. C. Madsen, M. I. Pownceby & A. N. Christensen [J. Appl. Cryst. (2004), 37, 362-368].

research papers


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J. Appl. Cryst. (2005). 38, 713-715  [ doi:10.1107/S0021889805016778 ]

Experimental determination of the X-ray attenuation coefficient of In at 8.047 keV

C. Ferrari, N. Verdi and A. Motta

Synopsis: The indium mass absorption coefficient for an X-ray energy of 8.047 keV has been experimentally determined with an accuracy of 1%. The value was compared with previous experimental and recent theoretical values.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 716-720  [ doi:10.1107/S0021889805017000 ]

Correlation function of the excluded volume

T. Kruglov

Synopsis: The paper introduces a correlation function of the excluded volume necessary for a real-space description of scattering from dense systems of spherical particles.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 721-726  [ doi:10.1107/S0021889805017012 ]

Spin-echo small-angle neutron scattering for dense systems of spheres

T. Kruglov

Synopsis: The paper presents (spin-echo) SANS correlation functions describing small-angle scattering on dense systems of spherical particles. (Spin-echo) small-angle correlation functions and associated correlation lengths for a single sphere, a dumbbell, excluded volume and structure are introduced.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 727-733  [ doi:10.1107/S0021889805018145 ]

Phase relations and equation of state of ZrO2 to 100 GPa

O. Ohtaka, D. Andrault, P. Bouvier, E. Schultz and M. Mezouar

Synopsis: The phase relations and equation of state of ZrO2 were investigated up to 100 GPa by means of in situ observation using laser heating in a diamond anvil cell and synchrotron radiation. In situ high-temperature experiments performed below 12.5 GPa suggest the possibility that stoichiometric ZrO2 does not show the cubic structure up to the melting temperature.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 734-739  [ doi:10.1107/S0021889805018972 ]

Application of in situ vapor sorption small-angle neutron scattering (SANS) to semicrystalline polymers: vapor pathway and structure evolution in semicrystalline linear polyethylene

M.-H. Kim and C. J. Glinka

Synopsis: The in situ vapor sorption technique is used to overcome the fundamental limitation of negligible neutron scattering contrast in semicrystalline polymers and to demonstrate that vapor selectively diffuses into the amorphous phase.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 740-748  [ doi:10.1107/S0021889805019758 ]

High-resolution X-ray diffraction of silicon-on-nothing

M. Servidori and G. Ottaviani

Synopsis: p- and n-type silicon samples containing a one-dimensional periodic array of buried empty channels were characterized by high-resolution X-ray diffraction. The crystal quality of the surface silicon layer and the layer containing the channels is much better in p- than in n-type samples, the former exhibiting Fraunhofer diffraction when the channels are normal to the scattering plane.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 749-756  [ doi:10.1107/S0021889805020418 ]

Structural changes in titanium dioxide nanocrystals during plastic deformation

U. Gesenhues

Synopsis: The polygonization of 200 nm rutile crystals during dry ball-milling was monitored by means of transmission electron microscopy, X-ray diffraction and pycnometrical density measurements. A modified Williamson-Hall evaluation was used; in addition, macrostrain was also measured.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 757-759  [ doi:10.1107/S0021889805023344 ]

Rietveld refinement of LaB6: data from µXRD

G. Ning and R. L. Flemming

Synopsis: Rietveld-quality micro X-ray diffraction (µXRD) data can be collected from the Bruker D8 DISCOVER diffractometer, provided that the diffraction conditions are selected carefully.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 760-767  [ doi:10.1107/S0021889805020820 ]

Space group determination: improvements in EXPO2004

A. Altomare, M. Camalli, C. Cuocci, I. da Silva, C. Giacovazzo, A. G. G. Moliterni and R. Rizzi

Synopsis: The automatic space-group determination procedure in EXPO2004 has been improved.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 768-771  [ doi:10.1107/S0021889805023745 ]

A study of the effect of annealing on Fe-doped LiNbO3 by HRXRD, XRT and FT-IR

G. Bhagavannarayana, R. V. Ananthamurthy, G. C. Budakoti, B. Kumar and K. S. Bartwal

Synopsis: The crystalline perfection of lithium niobate single crystals has been improved by post-growth thermal annealing with slow heating and cooling rates. The effect of annealing has been tested by high-resolution X-ray diffractometry and Fourier transform infrared (FT-IR) spectroscopy.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 772-779  [ doi:10.1107/S0021889805024477 ]

Structure of nanocrystalline MgFe2O4 from X-ray diffraction, Rietveld and atomic pair distribution function analysis

M. Gateshki, V. Petkov, S. K. Pradhan and T. Vogt

Synopsis: The atomic scale structure and the local structural disorder in nanocrystalline MgFe2O4 prepared by high-energy ball milling are determined using the Rietveld and the pair distribution function (PDF) techniques.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 780-786  [ doi:10.1107/S0021889805024660 ]

Structure factors from pseudo-Kossel line patterns

G. Bortel, M. Tegze and G. Faigel

Synopsis: The feasibility of obtaining a data set of X-ray structure factor amplitudes from a measured pseudo-Kossel line pattern is demonstrated.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 787-794  [ doi:10.1107/S0021889805024489 ]

Investigation of the primary crystallization of Ni-17 at.% P alloy by ASAXS

D. Tatchev, G. Goerigk, E. Valova, J. Dille, R. Kranold, S. Armyanov and J.-L. Delplancke

Synopsis: Small-angle X-ray scattering is used to determine simultaneously the particle size distribution and the size dependence of the particle composition.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 795-803  [ doi:10.1107/S0021889805021709 ]

Connection of segmented intensity data measured with a multiple-detector system for powder diffractometry

T. Ida

Synopsis: A Fourier method to connect segmented intensity data measured with a multiple-detector system for powder diffractometry has been developed. The method enables the correction of the differences in instrumental functions of different detectors.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 804-807  [ doi:10.1107/S002188980502265X ]

A comparison of methods for modeling the effect of axial divergence in powder diffraction

E. Prince and B. H. Toby

Synopsis: The Edgeworth series model for the modification of diffraction peak shapes because of axial divergence is compared with the peak shapes computed by a numerical convolution method. It is shown that if the width of an approximately Gaussian instrumental peak shape is comparable with the width of the modifying function, the Edgeworth model is nearly identical to the convolution model, while the computation is much simpler.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 808-818  [ doi:10.1107/S002188980502474X ]

High-order analytic translation matrix elements for real-space six-dimensional polar Fourier correlations

D. W. Ritchie

Synopsis: An analytic technique for calculating real six-dimensional rotational-translational correlations is described. The technique is demonstrated by superposing the steric shapes of a pair of globular protein domains.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 819-826  [ doi:10.1107/S0021889805025197 ]

ECSES - examining crystal structures using `e-science': a demonstrator employing web and grid services to enhance user participation in crystallographic experiments

S. J. Coles, J. G. Frey, M. B. Hursthouse, M. E. Light, K. E. Meacham, D. J. Marvin and M. Surridge

Synopsis: An application of e-science methodology using grid middleware networking technology to enable increased user interaction and participation with the UK EPSRC National Crystallography Service (NCS) is presented. This supports the crystallographic experiment through to the dissemination and further data use for e.g molecular property prediction. The viability of these interactions is assessed and future directions suggested.

Online 15 September 2005


short communications


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J. Appl. Cryst. (2005). 38, 827-829  [ doi:10.1107/S002188980501856X ]

Accurate charge density data collection in under a day with a home X-ray source

V. V. Zhurov, E. A. Zhurova, Y.-S. Chen and A. A. Pinkerton

Synopsis: Accurate charge density data were measured `in-house' in less than a day for pentaerythritol using a Rigaku R-Axis Rapid diffractometer with a curved image plate at 15 K.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 830-832  [ doi:10.1107/S0021889805024490 ]

Numerical conversion between the Pearson VII and pseudo-Voigt functions

H. Wang and J. Zhou

Synopsis: A numerical model for converting the shapes between the Pearson VII, pseudo-Voigt and Voigt functions is derived. As a result, features of the Voigt function can be applied to the Pearson VII and pseudo-Voigt functions.

Online 15 September 2005


computer programs


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J. Appl. Cryst. (2005). 38, 833-841  [ doi:10.1107/S0021889805021308 ]

dSNAP: a computer program to cluster and classify Cambridge Structural Database searches

G. Barr, W. Dong, C. J. Gilmore, A. Parkin and C. C. Wilson

Synopsis: dSNAP is a computer program for automatically classifying and visualizing the results of database searches using the Cambridge Structural Database where an exhaustive table of geometries has been obtained.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 842-846  [ doi:10.1107/S0021889805018571 ]

DS5: direct-searcher automatic system version 5 for small molecules running on Windows personal computers

K. Okada and P. Boochathum

Synopsis: DS5, for the crystal structure analysis of small molecules on personal computers, is a new program that integrates more than 18 main programs, subroutines and mathematics/graphic libraries of the DS*SYSTEM4 package.

Online 15 September 2005


laboratory notes


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J. Appl. Cryst. (2005). 38, 847-850  [ doi:10.1107/S0021889805019953 ]

Rapid preparation of custom grid screens for crystal growth optimization

A. B. Senger and T. C. Mueser

Synopsis: A method for the rapid preparation of custom grid-screen crystallization trays using standardized pipetting maps is presented.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 851-853  [ doi:10.1107/S0021889805022302 ]

A Swagelok-type in situ cell for battery investigations using synchrotron radiation

K. Nikolowski, C. Baehtz, N. N. Bramnik and H. Ehrenberg

Synopsis: An in situ battery cell based on a Swagelok junction for high-resolution X-ray diffraction is presented. The cell works in transmission mode with sample oscillation, allows fast data acquisition and is easy to assemble.

Online 15 September 2005


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J. Appl. Cryst. (2005). 38, 854-855  [ doi:10.1107/S0021889805020583 ]

A compact furnace for synchrotron powder diffraction measurements up to 1807 K

M. Yashima, M. Tanaka, K. Oh-uchi and T. Ida

Synopsis: A compact furnace has been designed and fabricated for measurements of high-resolution synchrotron radiation powder diffraction profiles from materials at high temperatures up to 1807 K in air, suitable for the multiple-detector system installed at the BL-4B2 experimental station of the Photon Factory in Tsukuba, Japan.

Online 15 September 2005


computer program abstracts


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J. Appl. Cryst. (2005). 38, 856-857  [ doi:10.1107/S0021889805024787 ]

Raptor3D: a tool for automatic mapping of up-to-date functional annotations to three-dimensional protein structures

G. Dieterich, M. Plail, W.-D. Schubert and J. Reichelt

Synopsis: Raptor3D, which interactively maps functional annotations provided by biological databases onto a graphical representation of a crystal structure, is described.

Online 15 September 2005


 

J. Appl. Cryst. (2005). 38, 858-860

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