G-vectors are a mathematical expression of the orientation of a crystal. Those are necessary for assigning orientations to certain crystals.

For the calculation, the software ImageD11 can be used. First, you have to load the peaks you found (e.g. .flt file from PeakSearch and enter the parameters. You can compute the G-vectors by following three steps:

1. Click Transformation –> Assign peaks to powder rings (nothing will happen)
2. Click Transformation –> Compute g-vectors (nothing will happen)
3. Click Transformation –> Save g-vectors. Make sure they get the ending .gve.