Journal ArticleDOI
The crystal structure of the synthetic zeolite L
Richard M Barrer,H. Villiger +1 more
TLDR
The crystal structure of the synthetic zeolite, Linde L, K6N aaA19Si27072. 21H20, has been determined from powder data at room temperature.Abstract:
The crystal structure of the synthetic zeolite, Linde L, K6N aaA19Si27072 . 21H20, has been determined from powder data at room temperature. The zeolite is hexagonal with unit-cell dimensions a = 18.4 A and c = 7.5 A. The structure has been refined assuming space group P6/mmm. The aluminosilicate framework is based upon the polyhedral cages which are formed by five six-membered and six four-membered rings and are found in can- crinite, erionite and offretite. These cavities are linked through the planes of their upper and lower six-membered ring, thus forming columns in which hexagonalread more
Citations
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Journal ArticleDOI
A new family of mesoporous molecular sieves prepared with liquid crystal templates
Jeffrey S. Beck,James C. Vartuli,Wieslaw J. Roth,M. E. Leonowicz,Charles T. Kresge,Kirk D. Schmitt,Cynthia Ting-Wah Chu,David H. Olson,E. W. Sheppard,S. B. McCullen,J. B. Higgins,J.L. Schlenker +11 more
TL;DR: In this paper, the synthesis, characterization, and proposed mechanism of formation of a new family of silicatelaluminosilicate mesoporous molecular sieves designated as M41S is described.
Journal ArticleDOI
The Hydrothermal Synthesis of Zeolites: History and Development from the Earliest Days to the Present Time
Colin S. Cundy,Paul A. Cox +1 more
Journal ArticleDOI
A molecular sieve with eighteen-membered rings
Mark E. Davis,Carlos Saldarriaga,Carlos Saldarriaga,Consuelo Montes,Juan M. Garces,Cyrus Crowdert +5 more
TL;DR: In this paper, the authors describe a family of aluminophosphate-based molecular sieves denoted as VPI-5, which are the first to contain rings consisting of greater than twelve tetrahedral atoms.
Journal ArticleDOI
Basic zeolites : Characterization and uses in adsorption and catalysis
TL;DR: The presence of basic centers in some oxides has been recognized for a long time as being important in catalysis as mentioned in this paper, and usually both basic and acid sites exist simultaneously, either independently or in a concerted way.
References
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Or fls--a fortran crystallographic least-squares program
TL;DR: A computer program to perform the least-squares refinement of crystal structure parameters based on x-rayor neutron-diffraction measurements is described and detailed instructions for its use are included.
Journal ArticleDOI
36. Hydrothermal chemistry of the silicates. Part VIII. Low-temperature crystal growth of aluminosilicates, and of some gallium and germanium analogues
Journal ArticleDOI
Second review of Al–O and Si–O tetrahedral distances
J. V. Smith,S. W. Bailey +1 more
Or ffe--a fortran crystallographic function and error program
TL;DR: In this article, a computer program that calculates irteratomic distances, bond angles, principal axes of thermal motion, and other functions of the unit cell parameters, the atomic coordinates, and the temperature factor coefficients of a crystal structure is described.