Searches by the experimental method used to determine the structure. The flag Has Experimental Data can be set to ignore (default), yes, or no. If it is set to yes the search will retrieve structures for the given experimental method only if experimental data have been deposited (i.e. structure factor files for X-Ray or NMR restraint files for NMR).
Enter "Experiment Methods:" X-RAY and select "Has Experimental Data:" Yes
This query returns X-Ray structures that have associated structure factor files.