<p dir="ltr">Enclosed are the data sets for the following publication;</p><p dir="ltr"><b>Identification of structural changes in CaCu3Ti4O12 on high energy ball milling and their effect on photocatalytic performance.</b></p><p dir="ltr">Cu K-edge and Ti K-edge X-ray absorption spectroscopy (XAS) raw data is provided in addition to TEM images.</p><p dir="ltr">All XAS data is provided a txt file in x,y format.</p><p dir="ltr">TEM images are Tif and dm3. file times.</p><p dir="ltr">Samples are labelled as O1100 (catalyst prepared from oxide with 1100 degree C calcination); G1100 (catalyst prepared by sol-gel) and G1100-7g (catalyst prepared by sol-gel and ball milled).</p><p dir="ltr">For the relevant methodology of data acquisition and interpretation please see the relevant section of the publication.</p>