The adhesive was released from the cured epoxy using acetone, leaving the samples with their flat surfaces exposed (Fig. ). Powder X-ray diffraction measurements were carried out in reflection (Bragg-Brentano) mode using a Rigaku SmartLab instrument equipped with a 9 kW rotating anode source providing a parallel beam of Mo radiation Kα radiation (0.70930 and 0.71361 Å). The arrays of samples were fixed to an XY table (Fig. ) where individual sample positions were selected from an image taken using a camera and scanned in series automatically overnight. For the four samples shown in Figure "measured with LaB6", samples were removed from the epoxy resin block and remaining resin removed by calcining the samples at 550°C for 4 hours. The powder was then mixed with LaB6 (cubic lattice parameter = 4.156852(2) Å) in an approximate 1: 1 ratio by mass, as an internal standard to confirm the measured lattice parameter. These samples were then measured on a Phillips PANalytical diffractometer with a monochromatic CoKα1 source (λ = 1.78901 Å) in Bragg-Brentano geometry. For all diffraction patterns, Pawley refinements were performed using TOPAS academic. With the exception of the cubic perovskite phase in BaYxSn1-xO3-x/2 samples, which was allowed to freely refine, lattice parameters for known phases were initially fixed, and all instrumental parameters refined (background, peak shape and zero error), then lattice parameters were released to obtain the refined values.