Citation: Meier, William R.; Chakoumakos, Bryan C.; Okamoto, Satoshi; McGuire, Michael A.; Hermann, Rapha\"el P.; Samolyuk, German D.; Gao, Shang; Zhang, Qiang; Stone, Matthew B.; Christianson, Andrew D.; Sales, Brian C. (2021). A Catastrophic Charge Density Wave in BaFe2Al9. Chemistry of Materials, , pp. -.