i have a question about the GSAS software. Indeed, i would like to know what are exactly the L11, L22, L33....L23 parameters. I saw that these parameters represent the anisotropic microstrain in material. Moreover, there is an empirical _expression_ which uses these parameters as following :
Gamma(L) = L11*h^2 + L22*k^2 + L33*l^2 + 2*L12*hk + 2*L13*hl + 2*L23*kl
I would like to know and understand the physical representation of these parameters and this _expression_.
Thanks in advance
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