Structure, and Phase Transformations of HPM-3: A Layered Precursor of the Neutral Aluminophosphate with <b>JSN</b> Topology.

ABSTRACT: The structure of HPM-3, a layered aluminophosphate prepared using 1,2,3-trimethylimidazolium (123TMI) as an organic structure-directing agent by the fluoride route, has been solved by continuous rotation electron diffraction (cRED), and Rietveld refined against synchrotron powder X-ray diffraction data. Charge balance of the occluded cation is achieved through F^- anions and dangling Al(OP)₃OH groups. Half of the Al is pentacoordinated in negatively charged Al(OP)₄-F-Al(OP)₄ pairs. The layers in HPM-3, denoted as jsn, are observed in the fully connected metalloaluminophosphate molecular sieves with JSN topology. Thus, HPM-3 can be a precursor to a JSN metal-free aluminophosphate if a topotactic condensation can be reached, whi

SUBMITTER: Yu H 

PROVIDER: S-EPMC11918533 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature