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Crystallography Software:
Download Links at the
NIST Center for Neutron Research

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GSAS & EXPGUI
The General Structure Analysis System (GSAS) is a software package to fit structural models to x-ray and neutron diffraction data. It can be used with both single-crystal and powder diffraction data (Rietveld analysis). EXPGUI is a Graphical user interface to GSAS. Both are distributed here as a combined package. Note that both GSAS (see http://www.ccp14.ac.uk/ccp/ccp14/ftp-mirror/gsas/public/gsas/) and EXPGUI are updated more frequently than this combined distribution. The latest release of EXPGUI is found at expgui_ALPHA.tar.gz or expgui_alpha.exe in the directories listed below. Note that it can be a good idea to install this combined distribution and then update GSAS or EXPGUI or both.
NIST ftp directory		ftp://ftp.ncnr.nist.gov/pub/cryst/gsas/
CCP14 mirrors	UK	http://www.ccp14.ac.uk/ccp/ccp14/ftp-mirror/briantoby/pub/cryst/gsas/
	Canada	ftp://ftp.ccp14.ac.uk/ccp14/ftp-mirror/briantoby/pub/cryst/gsas/
	Australia	http://ccp14.minerals.csiro.au/ccp/ccp14/ftp-mirror/briantoby/pub/cryst/gsas/
Platform		Windows	Mac (OS X)	Linux	SGI (Irix)
Download		gsas+expgui.exe	osx_gsasexpgui.dmg	LINUX_gsas+expgui.tar.gz	SGI_gsas+expgui.tar.gz (last updated Sept. 2005)
Installation instructions		expgui_Win_readme.html	osx.html	expgui_Unix_readme.html
Documentation		http://www.ncnr.nist.gov/programs/crystallography/software/expgui/expgui.html

CMPR & LOGIC
CMPR is a multipurpose program that can be used for displaying & scaling diffraction data, manual- & auto-indexing, peak fitting and other nifty stuff. The LOGIC program is used to locate entries in the ICDD-JCPDS PDF-2 powder diffraction database.
NIST ftp directory		ftp://ftp.ncnr.nist.gov/pub/cryst/powdersuite/
CCP14 mirrors	UK	http://www.ccp14.ac.uk/ccp/ccp14/ftp-mirror/briantoby/pub/cryst/powdersuite/
	Canada	ftp://ftp.ccp14.ac.uk/ccp14/ftp-mirror/briantoby/pub/cryst/powdersuite/
	Australia	http://ccp14.minerals.csiro.au/ccp/ccp14/ftp-mirror/briantoby/pub/cryst/powdersuite/
Platform		Windows	Mac (OS X)	Linux	SGI (Irix)
Download		cmpr+logic.exe	osx_cmpr.dmg	cmpr_alpha.tar.gz
Installation instructions		cmpr.html#WIN	cmpr.html#OSX	cmpr.html#UNIX
Documentation		CMPR (cmprdoc.html) and LOGIC (logicdoc.html)

CIFTOOLS
The CIFTOOLS includes two programs: pdCIFplot is used to plot of Rietveld results from pdCIF files, particularly for referee review. CIFEDIT is used to create browse through and edit CIF files. It may be used with all types of CIF files, including mmCIFs. At this time, a newer test release of these programs with expanded capabilities for dictionary use is available for windows (only). This release will be soon packaged for the other platforms.
NIST ftp directory		ftp://ftp.ncnr.nist.gov/pub/cryst/cif/
CCP14 mirrors	UK	http://www.ccp14.ac.uk/ccp/ccp14/ftp-mirror/briantoby/pub/cryst/cif/
	Canada	ftp://ftp.ccp14.ac.uk/ccp14/ftp-mirror/briantoby/pub/cryst/cif/
	Australia	http://ccp14.minerals.csiro.au/ccp/ccp14/ftp-mirror/briantoby/pub/cryst/cif/
Platform		Windows	Mac (OS X)	Linux	SGI (Irix)
Download		ciftools.exe and ciftools_alpha.exe	ciftools.tar.gz	ciftools.tar.gz	ciftools.tar.gz
Installation instructions		ciftools.html
Documentation		Overview: pdCIFplot and CIFEDIT.

Neither the U.S. Government nor the software author makes any warranty, expressed or implied, or assumes any liability or responsibility for the use of this information or the software described here. Brand names cited herein are used for identification purposes and do not constitute an endorsement by NIST.

Last modified 01-May-2006