Abstract
The lattice parameters of zeolite beta have been determined by means of electron diffraction, PXD, HREM and computer-assisted modelling. Zeolite beta belongs to monoclinic system with lattice parameters a m = b m = 1. 74nm, c m = 1. 43nm, β m = 114. 5°. We have taken structure image clearly showing 4-,5-,6-,12-member rings of zeolite beta. So far,this kind of HREM image of zeolite beta has not been reported. The arrangement of member rings and contrast of image are in well accordance with simulated image and projection of atoms confirming that the structural model of zeolite beta is correct. HREM images also show directly the high stacking fault densities of zeolite beta materials. There are stacking faults,incomplete dislocation and twins are universally present in zeolite beta.
| Original language | English (US) |
|---|---|
| Pages (from-to) | X14-254 |
| Journal | Petrochemical Technology |
| Volume | 26 |
| Issue number | 4 |
| State | Published - 1997 |
| Externally published | Yes |
Keywords
- Crystal defect
- Crystal structure
- Electron diffraction
- High resolution electron microscopy
- Zeolite beta
ASJC Scopus subject areas
- General Chemical Engineering
- Fuel Technology