(IUCr) Acta Crystallographica Section B Volume 46, Part 5, October 1990

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.

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issue contents

October 1990 issue

research papers

Charge density in (NH₄)₂Cr(SO₄)₂.6H₂O at 84 K: a Jahn–Teller distorted complex

Structures of two low-temperature incommensurate NbTe₄ phases

Anisotropy of van der Waals radii of atoms in molecules: alkali-metal and halogen atoms

Structural analysis of hollandite Ba_xTi³⁺_2xTi⁴⁺_8−2xO₁₆ with x = 1.07 and 1.31 from 5 to 500 K

Monophosphate tungsten bronzes with hexagonal tunnels, Na_x(PO₂)₄(WO₃)_2m: X-ray diffraction and HREM study

Disordered incommensurate structure of [N(CH₃)₄]₂CuBr₄ at 248 K

Structural variations in 3,4-dihydro-2H-pyran ketals: acyl and aryl warfarin derivatives

Low-resolution models for ribosomal particles reconstructed from electron micrographs of tilted two-dimensional sheets

Thermal motion analysis in [5]-, [6]- and [7]-circulene crystals: a harmonic lattice-dynamical calculation

Kristallstruktur einer racemischen Lipid-Doppelschicht bestimmt mit Synchrotronstrahlung

Solvent model for protein crystals: on occupancy parameters for discrete solvent sites and the solvent continuum

Conformational polymorphism of dimethyl 3,6-dichloro-2,5-dihydroxyterephthalate. II. Structural, thermodynamic, kinetic and mechanistic aspects of phase transformations among the three crystal forms

Structural changes of thiourea in connection with its phase transitions: reappraisal of rigidity and libration of the molecule

Structures and the photochemical hydrogen-abstraction reaction of tetraaryl-1,5-pentanediones

Dynamic conformational behaviour of an eleven-membered ring in the solid state. X-ray studies of cycloundecylmethyl 1-naphthylcarbamate at 120 and 293 K

Analysis of atomic displacement parameters and molecular motion in crystals

short communications

Crystal structure and nonlinear optical properties of KSnOPO₄ and their comparison with KTiOPO₄. Erratum

Modulated structures

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