TEMStrain    

Transformation matrix

"Transformation matrix" is provided to enable fitting of combinations of strain components. The functionality of this tool is best explained on an example. Suppose one wants to determine the 'a' parameter of a cubic lattice. This cannot be achieved by fixing all strain  components except those on the diagonal (crystal coordinate system, "Strain determination CCS" dialog box) because the three resulting values will be generally different. The proper approach will be to fix all components except "e(11)", and to modify the "Transformation matrix"  so only (11), (12) and (13) are non-zero and equal to 1. The transformation matrix can be modified by clicking on "TM" command button of  the "Strain determination CCS" dialog box. The default transformation matrix is the identity matrix.