Acta Crystallographica Section A
Acta Crystallographica
Section A FOUNDATIONS AND ADVANCES

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FOUNDATIONS
ADVANCES

Volume 50| Part 6

ISSN: 2053-2733

November 1994 issue

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Cover illustration: A computer-simulated Fourier transform of the following object symbolizing a small bidimensional crystal: Courtesy of A. Soyer and M. Pilard.

international union of crystallography

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A. J. C. Wilson. 80 years

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lead articles

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Structure relationship to dielectric, elastic and chiral properties

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research papers

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A unified treatment of small-angle X-ray scattering, X-ray refraction and absorption using the Rytov approximation

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A more general expression for the average X-ray diffraction intensity of crystals with an incommensurate one-dimensional modulation

E. J. W. Lam, P. T. Beurskens and S. van Smaalen

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A Bayesian approach to extracting structure-factor amplitudes from powder diffraction data

D. S. Sivia and W. I. F. David

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A topological definition of a Wigner–Seitz cell and the atomic scattering factor

P. F. Zou and R. F. W. Bader

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Study of thermal behaviour of oxygen in silicon crystals by analysis of X-ray Pendellösung fringes

M. Li, Z.-H. Mai and S.-F. Cui

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The reduction of N-beam scattering from noncentrosymmetric crystals to two-beam form

A. F. Moodie and H. J. Whitfield

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New n-beam dynamical calculations combining two- and three-dimensional Bloch waves

K. Mitsuishi, K. Watanabe and I. Hashimoto

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On the statistical analysis of orientation data

N. C. Krieger Lassen, D. Juul Jensen and K. Conradsen

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STEP – a trial-and-error procedure for crystal structure determination. I. A description of the program system SYSTEM90

Y. Hou, M. Gao, L. Li and P. Hou

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The density of three-dimensional nets

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On the validity of the direct phasing and Fourier method in electron crystallography

L.-M. Peng and S. Q. Wang

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The probabilistic estimation of triplet invariants: the formula P₁₃

M. C. Burla, C. Giacovazzo, A. G. G. Moliterni and J. Gonzalez Platas

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Derivation of Wyckoff positions of N-dimensional space groups. Theoretical considerations

J. Fuksa and P. Engel

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short communications

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The heavy atom problem: a statistical analysis. II. Consequences of the a priori knowledge of the noise and heavy-atom powers and use of a correlation function for heavy-atom-site determination. Erratum

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Automated structure analysis in electron crystallography: phase determination with the tangent formula and least-squares refinement. Erratum

D. L. Dorset and M. P. McCourt

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On the modelling of neutron diffraction reflections from small single crystals. Erratum

A. McL Mathieson and A. W. Stevenson

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international union of crystallography

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Prices of IUCr journals

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book reviews

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Out of the crystal maze. Chapters from the history of solid-state physics edited by L. Hoddeson, E. Braun, J. Teichmann and S. Weart

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Random, non-random and periodic faulting in crystals by M. Sebastian and P. Krishna

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books received

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Band theory of solids: an introduction from the point of view of symmetry by S. L. Altmann

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Advances

Recently published Advances articles are given below.

Interpretation of angular symmetries in electron nanodiffraction patterns from thin amorphous specimens. A. C. Y. Liu, G. R. Lumpkin, T. C. Petersen, J. Etheridge & L. Bourgeois (2015). Acta Cryst. A71, doi:10.1107/S2053273315011845.

Identification of inversion domains in KTiOPO₄ via resonant X-ray diffraction. F. Fabrizi, P. A. Thomas, G. Nisbet & S. P. Collins (2015). Acta Cryst. A71, 361-367.

Partial order among the 14 Bravais types of lattices: basics and applications. H. Grimmer (2015). Acta Cryst. A71, 143-149.

SHELXT - Integrated space-group and crystal-structure determination. G. M. Sheldrick (2015). Acta Cryst. A71, 3-8.

Special issues

Mathematical Crystallography

Bragg centennial issue

Laue centennial issue

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