Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

Volume 50| Part 4

ISSN: 2052-5206

August 1994 issue

Cover illustration: Difference electron-density distributions for the prismane derivative clearly reveal `bent bonds' in the three- and four-membered rings, see Irngartinger & Oeser, pages 459-464.

research papers

A neutron powder investigation of the high-temperature structure and phase transition in LiNbO₃

H. Boysen and F. Altorfer

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Method of crystal-structure similarity searching

A. V. Dzyabchenko

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The optical activity and absolute optical chirality of NaNH₄SO₄.2H₂O

S. Arzt and A. M. Glazer

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Structure of the Hofmann clathrates Ni(NH₃)₂Ni(CN)₄.2C₆D₆ and Zn(NH₃)₂Ni(CN)₄.2C₆H₆

H. G. Büttner, G. J. Kearley, C. J. Howard and F. Fillaux

CCDC references: 1174401; 1174402; 1174404

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Synchrotron X-ray study of the electron density in α-Fe₂O₃

E. N. Maslen, V. A. Streltsov, N. R. Streltsova and N. Ishizawa

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Structure determination with Laue diffraction data – including refinement when anomalous scatterers are present

I. M. Dodd, Q. Hao, M. M. Harding and S. M. Prince

CCDC references: 1189208; 1204639

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X-ray and neutron investigation of the structure and disorder in dicalcium barium acrylate

G. Hofstätter, W. Prandl, T. Brückel and W. Hiller

CCDC references: 1174405; 1174406

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Structure of trans,trans-4,4'-di(methoxycarbonylimino)dicyclohexylmethane: a model for trans,trans-4,4'-diisocyanatodicyclohexylmethane/1,4-butanediol-based units in polyurethane hard segments

W. Milius, C. Steinlein and C. D. Eisenbach

CCDC reference: 1174407

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short communications

Difference-density distribution of a prismane derivative

H. Irngartinger and T. Oeser

CCDC reference: 1174408

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research papers

X-ray Rietveld structure determination of ammonium Rochelle salt at 120 (paraelectric phase) and 100 K (ferroelectric phase)

Z. Brożek, D. Mucha and K. Stadnicka

CCDC references: 1255339; 1255340

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Structure of the stable phase of methylhydrazine – first observations of phase transitions

M. Foulon, N. Lebrun, M. Muller, A. Amazzal and M. T. Cohen-Adad

CCDC reference: 1174411

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book reviews

Reviews in computational chemistry. Vol. 3 edited by K. B. Lipkowitz and D. B. Boyd

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books received

Minerals and reactions at the atomic scale. Transmission electron microscopy edited by P. Buseck

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Electron crystallography edited by D. Dorset

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The structural chemistry of silicates edited by A. Wright

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Linear and nonlinear optical properties of molecules by G. H. Wagnière

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Modulated structures

The theory of modulated structures and the study of such materials constitute an active and healthy field in crystallography. To view visualizations of over 60 modulated stuctures published in Acta Crystallographica Section B, click on the structure below.