Bulk Amorphous Alumina: The Density-Driven Interplay of Pentahedral Pyramids and Octahedra for High Dielectric Permittivity - Hideki Hashimoto; Yohei Onodera; Rei Okuno; Masashi Miyakawa; Hitoshi Yusa; Takashi Taniguchi; Sho Kakizawa; Shuya Sato; Takao Shimizu; Taro Kuwano; Takato Abe; Naoki Takata; et al. (Journal of the American Chemical Society, 2026)