![]() ![]() We frequently get bug reports without enough information to find what is wrong or that might have already been fixed. ![]() We are no longer supporting Python 2.7 or where is your preference for a mailing list login password). We are tracking down bugs due to changes in wxPython 4.2.0. GSAS-II and Python 3.x: GSAS-II now requires Python 3.7 and later with wxPython >=4.0. Also, please sign up for the mailing list after installing GSAS-II. The license for use is included with the software and is found here. via Anaconda's conda package manager (not currently working).GSAS/EXPGUI users are strongly encouraged to switch to use of GSAS-II. GSAS-II now provides all of the capabilities in the GSAS/EXPGUI programs, which are no longer supported. Be sure to use the Help->Update capability frequently to stay abreast of new features and fixes as they are added. We are adding new features to the code quite frequently, so we may break things from time to time ( see bug reporting, below). Please help us by citing it in your papers. If you use GSAS-II, we encourage you to sign up for the GSAS-II mailing list ( see below). GSAS-II is made available for free use ( see license) with open access to GSAS-II also provides small-angle scattering and reflectometry fitting and simulation of the effects of stacking faults. When large numbers of patterns are measured with parametric changes in measurement settings, GSAS-II provides a novel capability to fit all patterns in a single sequential refinement with subsequent parametric fitting. Instrumental profile parameters can be fit to data from standards or derived from fundamental parameters sample profile effects (crystallite size and microstrain) are treated independently from the instrument. Pair distribution functions (PDF) can be computed from high-energy x-ray diffraction. With powder diffraction, GSAS-II supports all stages of data reduction and analysis, including area detector calibration and integration, pattern indexing, LeBail and Pawley intensity extraction and peak fitting. For magnetic scattering, all possible color subgroups can be derived and explored. Many capabilities of GSAS-II are unique to GSAS-II or are only found in software with very limited scope. It provides structure solution and refinement as well as extensive visualization capabilities. Refinements can combine measurements from laboratory and synchrotron x-rays as well as constant wavelength or time-of-flight * neutron sources. GSAS-II is a unique and comprehensive open source Python project for determination of crystal structures and diffraction-based materials characterization for crystalline solids on all scales, from perovskites through proteins, using both powder and single-crystal diffraction and with both x-ray and neutron probes.
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