MCM 56, a novel layered zeolite, has been synthesized under a stirring condition by hydrothermal method and characterized by XRD, TEM, TG and DTA. TEM shows that most of the crystals exist in the form of single layer....MCM 56, a novel layered zeolite, has been synthesized under a stirring condition by hydrothermal method and characterized by XRD, TEM, TG and DTA. TEM shows that most of the crystals exist in the form of single layer. Based on the experimental facts and framework type which MCM 56 belongs to, MCM 56 should consist of very thin MWW type layers which are just one unit cell along the c direction, and have a unique architecture with two dimensional 10 MR pore system inside the layer and 12 MR cups(half of the MWW cages described in the MCM 22 or MCM 49) on the crystal exterior without cages between layers.展开更多
文摘MCM 56, a novel layered zeolite, has been synthesized under a stirring condition by hydrothermal method and characterized by XRD, TEM, TG and DTA. TEM shows that most of the crystals exist in the form of single layer. Based on the experimental facts and framework type which MCM 56 belongs to, MCM 56 should consist of very thin MWW type layers which are just one unit cell along the c direction, and have a unique architecture with two dimensional 10 MR pore system inside the layer and 12 MR cups(half of the MWW cages described in the MCM 22 or MCM 49) on the crystal exterior without cages between layers.
