A symmetrical indexing scheme for decagonal quasicrystals analogous to Miller–Bravais indexing of hexagonal crystals

An indexing scheme for decagonal quasicrystals, analogous to the Miller–Bravais indexing of hexagonal crystals, is proposed and compared with other decagonal schemes. The status of the zone law for decagonal quasicrystals is discussed and elucidated.

Multiple twinning in cubic crystals: geometric/algebraic study and its application for the identification of the Σ3ⁿ grain boundaries

Multiple twinning in cubic crystals is represented geometrically by three-dimensional fractals and algebraically by groupoids. The groupoid composition table can be used to identify the Σ3ⁿ grain boundaries in EBSD maps.

Simultaneous fitting of X-ray and neutron diffuse scattering data

This paper presents the refinement of a structural model based on X-ray and neutron diffuse scattering data, which promises to give unprecedented insights into nanoscale order in materials.

Effectiveness of iterative algorithms in recovering phase in the presence of noise

The effect of noise specific to coherent X-ray diffraction imaging experiments on the iterative algorithms typically used to solve the phase problem in this context is explored.

Accurate structure factors and experimental charge densities from synchrotron X-ray powder diffraction data at SPring-8

Accurate structure factors of silicon and diamond have been determined from powder diffraction data measured at SPring-8, BL02B2. The accuracy of structure factors is evaluated. The usefulness of the present structure factors is also reported.

Infinite geodesic paths and fibers, new topological invariants in periodic graphs

Minimal 1-periodic subgraphs are shown to play important roles as topological invariants of crystallographic nets and other periodic graphs.

Direct Bragg-peak phase retrieval by a hybrid-input–output algorithm with proper intensity normalization

With Bragg peaks normalized to those of solid spheres of uniform electron density, a dual-space iteration-based algorithm is applied to successfully reconstruct hypothetical 500- and 1000-atom carbon cluster crystal structures at both high and low resolutions.

Transformational space-group symbols

A transformational space-group symbol (TSG) composed of the well defined standard space-group identifier, an explicitly given axis system transformation and an origin shift is proposed to designate any space-group description.

Nominations for the Ewald Prize

Notes for authors 2007