English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Optical Investigations of Intergrowth Effects in the Zeolite Catalysts ZSM-5 and ZSM-8

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Weidenthaler, C., Fischer, R. X., Shannon, R. D., & Medenbach, O. (1994). Optical Investigations of Intergrowth Effects in the Zeolite Catalysts ZSM-5 and ZSM-8. The Journal of Physical Chemistry, 98(48), 12687-12694. doi:10.1021/j100099a036.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-2207-3
Abstract
X-ray precession photographs and optical investigations of TPA-ZSM-5 (silicalite) and TEA-ZSM-8 zeolites reveal that ZSM-8 consists of two interpenetrating species rotated by 90° round the crystallographic c axis similarly to ZSM-5. The c axis of ZSM-5 coincides with refractive index nx, the c axis of ZSM-8 coincides with ny. The intergrowth species are differently shaped in ZSM-5 and ZSM-8. ZSM-5 consists of an orthorhombic prism penetrated by two pyramidal fragments. The ZSM-8 crystals studied here consist of species with two-dimensional hourglass-like shapes embedded in orthorhombic prisms. The orientations of the optical indicatrices of ZSM-5 and ZSM-8 are identical after calcination, Le., after removing or decomposing the template. This confirms recent work which showed that the framework structures of ZSM-5 and ZSM-8 are essentially identical.