I have a crystal that grows with multiple lattices despite the fact that the crystals look more or less like single crystals under the microscope.

With a lot of guesswork I am able to index with mosflm by carefully selecting spots that appear to be in the same lattice. Now I would like to use the known cell and symmetry to index more datasets that have the same "twinning" problem.

Is there any way to do a search of crystal orientation matrices with a known cell to find the best fit to the diffraction pattern? The data were collected on the Pilatus6M detector so I am limited to mosflm and XDS for processing. Both packages always trying to index the crystal without using the known cell and symmetry to get the orientation matrix. I thought of writing a script to do a full search (testing all orientations sequentially) in mosflm but I thought that I should submit to the experts before I try anything.

cheers.
Jason

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