Acta Crystallographica Section A
Acta Crystallographica
Section A FOUNDATIONS AND ADVANCES

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FOUNDATIONS
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Volume 35| Part 1

ISSN: 2053-2733

January 1979 issue

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research papers

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Ewald dynamical diffraction symposium

J. M. Cowley and R. A. Young

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A review of my papers on crystal optics 1912 to 1968

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On extinction. III. An improvement of the secondary-extinction theory

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A solution of the X-ray `phase problem'

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Computer-simulation methods in X-ray topography

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Dynamical theory for electron scattering from crystal defects and disorder

J. M. Cowley and P. M. Fields

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Contribution of diffraction to the contrast of dislocations in X-ray topography

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The absolute measured value of f(220) for Cu –the importance of extrapolation to zero extinction

J. K. Mackenzie and A. McL Mathieson

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On freedom from extinction and the (universal) kinematical limit

A. McL Mathieson

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A comparison of the least-squares and maximum-likelihood estimators for counts of radiation quanta which follow a Poisson distribution

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The role of Debye–Waller-factor measurement in the analysis of diffuse-scattering data

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Net atomic charges and molecular dipole moments from spherical-atom X-ray refinements, and the relation between atomic charge and shape

P. Coppens, T. N. Guru Row, P. Leung, E. D. Stevens, P. J. Becker and Y. W. Yang

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Correction of single-crystal intensities for average values of multiple reflection

Y. Le Page and E. J. Gabe

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A priori estimates of errors in intensities for imperfectly spherical crystals

M. G. Vincent and H. D. Flack

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Tensorial covariants for the 32 crystal point groups

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A simplified calculation and tabulation of tensorial covariants for magnetic point groups belonging to the same Laue class

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The joint probability distribution of the structure factors in a Karle–Hauptman matrix

J. J. L. Heinerman, H. Krabbendam and J. Kroon

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Conditional phase probability distributions of structure factors in a Karle–Hauptman matrix

J. J. L. Heinerman, J. Kroon and H. Krabbendam

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Ferroelastic transformations in lead orthophosphate and its structure as a function of temperature

D. M. C. Guimaraes

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Basic theorems of vector symmetry in crystallography

R. Sadanaga and K. Ohsumi

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Problems of resolution and bias in the experimental determination of the distribution of electron density and other densities in crystals

A. J. C. Wilson

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Use of the neutron time-of-flight technique for structure investigations

A. M. Balagurov, E. Borca, M. Dlouha, Z. Gheorghiu, G. M. Mironova and V. B. Zlokazov

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X-ray high-order refinements of hydrogen atoms: a theoretical approach

J. Almlöf and T. Ottersen

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Experimental electronic valence charge density of NaCl and SrCl₂ along the nearest-neighbour axis

M. V. H. Linkoaho

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New layered structure of Bi₂W₂O₉ determined by 1 MV high-resolution electron microscopy

Y. Bando, A. Watanabe, Y. Sekikawa, M. Goto and S. Horiuchi

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On the treatment of protein data measured on the oscillation camera

K. Wilson and D. Yeates

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Transformations to optimize the superposition of similar structures

W. A. Hendrickson

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X-ray diffraction by small crystals

T. Ino and N. Minami

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Diffraction profiles from small crystallites

N. Minami and T. Ino

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Extinction in sodium fluoride

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The structure of ordered Ag₃Mg: an ordinary long-period alloy as opposed to periodically antiphased alloys

M. Guymont and D. Gratias

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Mögliche Kristallstrukturen für oktaedrische Moleküle MX₆ bei dichtester Packung der X-Atome

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A hard-disc system: structures of a close-packed thin layer

P. Pierański and J. Finney

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Structural changes in β-FeOOH caused by radiation damage

S. T. Galbraith, T. Baird and J. R. Fryer

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X-ray interferometry with divergent polychromatic beams

E. V. Shulakov and V. V. Aristov

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Derivation of three-phase invariants from the Patterson function

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A new Monte Carlo method for phase determination

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Electrogyration and piezogyration in NaClO₃

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The crystal structure of hexabromobenzene: constrained refinement of neutron powder diffraction data

E. Baharie and G. S. Pawley

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Derivation of selenium–selenium nonbonded potential parameters for molecular crystals

H. A. J. Govers

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Third-order elastic constants of cubic sodium cyanide and potassium cyanide

S. Haussühl and W. Michaelis

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short communications

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Lindemann's rule and the X-ray Debye temperature of anisotropic Zn and Cd single crystals

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Phase information from anomalous-scattering measurements

W. A. Hendrickson

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Absorption corrections for neutron diffraction

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Errors in coordinates, bond lengths, and bond angles

G. B. Carpenter

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Extinction in single crystals of UO₂

M. J. Cooper, M. Sakata and K. D. Rouse

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international union of crystallography

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Copying Fees and Copyright Law

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Prices of Acta Crystallographica and Journal of Applied Crystallography

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Union office, Change of Address

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book reviews

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Fundamental crystallography by Yu. E. Sirotin and M. P. Shaskolskaya

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Optical data processing. Topics in applied physics. Vol. 23 edited by D. Casasent

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Electron density mapping in molecules and crystals edited by F. L. Hirschfeld

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books received

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Images by C. A. Taylor

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Landolt–Börnstein. Numerical data and functional relationships in science and technology. Group III. Crystal and solid state physics. Vol. 7. Crystal structure data of inorganic compounds. Part c1 by W. Pies and A. Weiss

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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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