Fig. 2. A summary of outcomes from the synthesis experiments targeting YBa₂Cu₃O_6.5 (YBCO).

a Distributions of YBCO yield (wt. %) at different synthesis temperatures represented using violin and box plots, where each box extends from the lower to upper quartiles. b The success rate of each precursor, defined as the percentage of sets where that compound is included and forms YBCO without any impurities. c Common impurity phases that prevent YBCO formation are shown by a pie chart, where each slice represents the relative number of occurrences for each compound at 900 °C. The small gray sliver includes two less commonly observed impurities, YBaCu₃O₇ and YBa₄Cu₃O₉.