Proton Intercalation into an Open‐Tunnel Bronze Phase with Near‐Zero Volume Change. - Kawai, Kosuke; Jang, Seong‐Hoon; Igarashi, Yuta; Yazawa, Koji; Gotoh, Kazuma; Kikkawa, Jun; Yamada, Atsuo; Tateyama, Yoshitaka; Okubo, Masashi (Angewandte Chemie International Edition, 2025)