Akiji Yamamoto

This is the guide for programs and tables for modulated structure analysis, which is available via http (http://quasi.nims.go.jp/yamamoto/).

Programs for Modulated Structures

• remos: leastsquares program for the refinement of modulated structures for a single crystal.
• premos: the powder version of remos.
• modplt: a program for plotting modulation functions.
• prjms: a program for plotting modulated structure in 3D space.

All the programs use the i/o routine package remosio. The last three programs use the subroutine package calcomp, which simulates the plotter subroutine package of Calcomp Co Ltd. These are the Fortran and C source codes. There are two versions, one for UNIX and the other for Vax VMS. The latter is written only in Fortran. If you have some problem for the link of the Fortran and C programs in the UNIX version, please try VMS version.

For downloading, press download REMOS95.1_3 UNIX version(last modified Jan. 27, 2004) (2.84Mb),

Superspace groups for 1D, 2D and 3D Modulated Structures.

Superspace Group Tables

Software package for Quasicrystal structure analysis (last modified Jul. 03, 2006)

This package includes the following programs

• qcdiff03 : quasicrystal structure refinement program
• qcstrc02 : drawing program of quasicrystal structures
• cluster : drawing clusters in quasicrystals
• qcmem : Fourier map and Maximum Entropy Method for quasicrystals (large memory version)
• qcmem_s: Fourier map and Maximum Entropy Method for quasicrystals (small memory version)
• polygn : drawing program of occupation domains for dihedral quasicrystals
• polyhd : drawing program of occupation domains for icosahedral quasicrystals
• lodemac : low-density-elimination method for quasicrystals and other aperiodic crystals
• extrhkl: small program for extracting specified data set from the output of lodemac
• pltint : plotting Fo/Fc etc.

At the moment, Linux, Windows (2000, XP) and Mac OS X versions are available.

For downloading, press download QUASI06_07.03 LINUX version for Fedora Core 5 (last modified Jul 03, 2006) (23Mb)

For downloading, press download QUASI06_07.25 LINUX version for Redhat 9 (last modified Jul 25, 2006) (20Mb)

For downloading, press download QUASI06_win.01_05 Windows version(last modified Jan. 05, 2006) (21Mb)

For downloading, press download QUASI06_mac.01_05 Mac OS 10.4(Tiger) version(last modified Jan. 05, 2006) (25Mb)

For publications using the program lodemac, the following paper should be cited. H. Takakura, M. Shiono, T. J. Sato, A. Yamamoto, and A. P. Tsai, Phys. Rev. Lett. 86 (2001) 236-239. For other programs, A. Yamamoto, Acta Cryst. A52 (1996) 509-560 should be cited.

Requirement for computers: For all programs except for qcmem, a computer memory larger than 512MB may be necessary. For qcmem, a memory larger than 1GB or more will be needed. If you have "Segmentation fault" error message, more memory size may be necessary. All the programs are terminal_based. In Mac, you can run these programs in Terminal, while in Windows, you can use command prompt instead. For their installation and usage, read README file. (All the files are in a compressed tar file.)