Add to ORKGThe validity of the Sayre equation [Sayre (1952). Acta Cryst. 5, 60-65] for (3+n)-dimensional periodic structures i examined. A practical procedure is pro-posed for the determination of incommensurate modulated structures; this is an extension of the direct method previously proposed for solving superstruc-tures [Fan Hai-fu, He Lao, Qian Jin-zi & Liu Shi-xiang (1978). Acta Phys. Sin. 27, 554-558]. With the newly proposed method, the phase problem for the main as well as the satellite reflections can be solved directly without making particular assumptions about the modulation. A.known incommensurate modu-lated structure, y-Na2CO3, was used in the test. Satis-factory results were obtained
Since the discovery of X-ray diffraction, it was believed that the discrete distribution of diffract...
Since the first discovery and description of materials, whose structures are not periodic, enormous ...
Crystallography of aperiodic systems is a relatively new field in structural sciences and probably o...
The validity of the Sayre equation [Sayre (1952). Acta Cryst. 5, 60-65] for (3 + n)-dimensional peri...
A direct method is proposed for the determination of the modulation in incommensurate intergrowth co...
A modified Sayre equation for incommensurate intergrowth compounds is presented. With this equation,...
A modified Sayre equation for incommensurate intergrowth compounds is presented. With this equation,...
A procedure is presented for the automatic solution of composite (misfit) layer compounds, for the c...
The symmetry of superstructures is described by an ordinary three-dimensional space group, based on ...
Crystals usually are considered as being built by a three-dimensional periodic array of relatively s...
Superspace symmetry has been for many years the standard approach for the analysis of non-magnetic ...
The symmetry of incommensurate crystals can be described by higher dimensional space groups in the s...
program for solving one-dimensionally modulated incommensurate structures and composite structures c...
MA(x)Te(2) (M = Ta, Nb and A = Si, Ge) compounds show a great variety of commensurately and incommen...
Since the discovery of X-ray diffraction, it was believed that the discrete distribution of diffract...
Since the first discovery and description of materials, whose structures are not periodic, enormous ...
Crystallography of aperiodic systems is a relatively new field in structural sciences and probably o...
The validity of the Sayre equation [Sayre (1952). Acta Cryst. 5, 60-65] for (3 + n)-dimensional peri...
A direct method is proposed for the determination of the modulation in incommensurate intergrowth co...
A modified Sayre equation for incommensurate intergrowth compounds is presented. With this equation,...
A modified Sayre equation for incommensurate intergrowth compounds is presented. With this equation,...
A procedure is presented for the automatic solution of composite (misfit) layer compounds, for the c...
The symmetry of superstructures is described by an ordinary three-dimensional space group, based on ...
Crystals usually are considered as being built by a three-dimensional periodic array of relatively s...
Superspace symmetry has been for many years the standard approach for the analysis of non-magnetic ...
The symmetry of incommensurate crystals can be described by higher dimensional space groups in the s...
program for solving one-dimensionally modulated incommensurate structures and composite structures c...
MA(x)Te(2) (M = Ta, Nb and A = Si, Ge) compounds show a great variety of commensurately and incommen...
Since the discovery of X-ray diffraction, it was believed that the discrete distribution of diffract...
Since the first discovery and description of materials, whose structures are not periodic, enormous ...
Crystallography of aperiodic systems is a relatively new field in structural sciences and probably o...