[GSAS-II] Mustrain_Model_Generalized

[Myrsini K.]

Dear GSAS experts,

I hope my e-mail finds you well!

I have a question concerning the accuracy of the refined-generalized mustrain Shkl values that I get.

I am using P4/nmm as a space group and I get a good model when I refine the values S400, S004, S220 & S022 (instead of just refine the isotropic-mustrain model). 

The occurred values seem to me that are big enough (S400= 241424, S004= 26730, S220=247007 & S022=210135) and I don’t understand which is the physical meaning behind these numerical values that I get after the refinement. I was wondering what these values tell me about the anisotropic strain of my material (Fe2Se2) thus which is the physical meaning and what are the units of the Shkl mustrain values?

Thank you a lot in advance. 

Best regards,
KAITATZI Myrsini
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PhD Candidate,
Institute of Electronic Structure and Laser (IESL),
Foundation for Research and Technology - Hellas (FORTH),
100 Nikolaou Plastira str, Vassilika Vouton,
700 13 Heraklion, Crete,
GREECE

Office Phone (+30) 2810 391874 
Lab Phone     (+30) 2810 391349
Mobile  (+30) 6945084322

Quantum Materials & Magnetism Lab
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