Diffractograms of the films were collected using a Rigaku SmartLab diffractometer (Rigaku, Japan) with Cu Kα radia on source and a HyPix-3000 detector. ASD films were gently scraped with a disposable scalpel and the scrapings were placed on a low-background sample holder (⌀5 x 0.2 mm) and scanned from 3 to 40° 2θ using a 2° min -1 scan rate and a step size of 0.01°.