What is the structure of a .prm file in GSAS?

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Sureshkumar Markanday

.prm file - "prm" stands for parameter, it is the file format obtained from the general structural analysis system (GSAS). The structure of .prm file consists set of peak profile parameters that are dependent on the instrument.

Based on the base data, for example, for a .prm file for a powder x-ray diffraction (xrd) data, we can feed the generic parameters of a well-defined crystal structure. Once this is fed, when we analyze the .prm file of similar crystal structure using GSAS, it is possible to correlate the parameters with the new system and interpret the data.

Aashranth B.

Dr. Sureshkumar Markanday , thank you, but I am looking for the interpretation of the specific individual parameters- INS 1I ITYP, INS 1PRCF1 , INS 1PRCF11. Have you found these in any manual/other technical literature?