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Schematic 3-D representation of the tetrahedra (T) consisting of trimers of chromium octahedra and 1,3,5-benzene tricarboxylic acid (BTC) or 1,4-benzene dicarboxylic acid (BDC) in MIL-101 and MIL-100, respectively (top) and a schematic 3-D illustration of the zeotype-architecture MIL-100 and MIL-101 (bottom) [53].
