Powder capillary XRD was performed at beamline 2-1 at the Stanford Synchrotron Radiation Lightsource (SSRL) with a beam energy of 17 keV. A LaB 6 standard reference material was used to calibrate the energy. Powder was packed into 0.5 mm outer diameter special glass capillaries (Charles Supper), which were continuously rotated throughout the measurement to avoid preferential orientation effects. A beam size of 0.5 mm (perpendicular to the capillary) and 1 mm (parallel to the capillary) was used. Data were recorded using a Pilatus100K detector at a distance of 700 mm from the sample.