Cd5Te4O12X2 (X = Cl, Br, I): a new oxyhalide family with [CdO4X] mixed anionic units and adjustable optical properties

Three new tellurate halides, Cd 5 Te 4 O 12 X 2 (X = Cl, Br, I) with layered structures, belonging to a new oxyhalide family AII5BIV4OII12XI2, have been rationally designed and fabricated experimentally.