The framework topology of ZSM-18, a novel zeolite containing rings of three (Si,Al)-O species
- Mobil Research and Development Corp., Paulsboro, NJ (USA)
ZSM-18 is the first known aluminosilicate zeolite to contain rings of three (Si,Al)-O species (3-rings). Its framework topology has been determined by hypothetical model building, subsequent constrained distance and angle least-squares refinements of atomic coordinates, and x-ray powder diffraction pattern simulations. Its channel structure is characterized by a linear unidimensional 12-ring channel, with an approximate pore opening of 7.0 angstroms. In addition, the channels are lined with pockets that are capped by 7-rings with dimensions of 2.8 angstroms by 3.5 angstroms. An intraframework packing model of the organic moiety used in the synthesis suggests that a strong templating effect may be responsible for the formation of this unusual zeolite structure. 14 refs., 4 figs., 1 tab.
- OSTI ID:
- 6665835
- Journal Information:
- Science (Washington, D.C.); (USA), Vol. 247:4948; ISSN 0036-8075
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PETROCHEMICALS
PROCESSING
PETROLEUM
REFINING
ZEOLITES
CATALYTIC EFFECTS
CATALYSIS
EXPERIMENTAL DATA
MOLECULAR STRUCTURE
DATA
ENERGY SOURCES
FOSSIL FUELS
FUELS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
NUMERICAL DATA
PETROLEUM PRODUCTS
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