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HPM-14, a New Germanosilicate Zeolite with Interconnected Extra-Large Pores Plus Odd-Membered and Small Pores

submitted on 20.04.2020, 11:38 and posted on 21.04.2020, 13:25 by Zihao Gao, Jian Li, Cong Lin, Alvaro Mayoral, Junliang Sun, Miguel Camblor
We describe HPM-14, a new extra-large pore zeolite synthesized using imidazolium-based organic structure-directing agents, fluoride anions and germanium and silicon as tetrahedral components of the framework. Due to the presence of stacking disorder, the structure elucidation of HPM-14 was challenging, and different techniques were necessary to clarify the details of the structure and to understand the nature of the disorder. The structure has been solved by three-dimensional electron diffraction technique (3D ED) and consists of an intergrowth of two polymorphs possessing a three-dimensional channel system, including an extra-large pore opened through windows made up of sixteen tetrahedral atoms (16-membered ring, 16MR) as well as two additional sets of odd-membered (9MR) and small (8MR) pores. The intergrowth has been studied by scanning transmission electron microscopy (C s -STEM) and powder X-ray diffraction simulations (DIFFaX), which show a large predominance of the monoclinic polymorph A.


Spanish Ministry of Science, Innovation and Universities, project MAT2015-71117-R, MINECO/FEDER, UE

National Natural Science Foundation of China, No. 21871009, 21621061, 21527803, 21471009, NFSC-21850410448, NSFC-21835002

Swedish Research Council (VR)

the Knut and Alice Wallenberg Foundation (KAW)

SPST of ShanghaiTech University, contract 126 No. EM02161943

Spanish Ministry of Science, Innovation and Universities, Ramon y Cajal Program, RYC2018-024561-I


Email Address of Submitting Author


Consejo Superior de Investigaciones Científicas



ORCID For Submitting Author


Declaration of Conflict of Interest

No conflict to declare