Zobrazeno 1 - 10
of 21
pro vyhledávání: '"John. L. Schlenker"'
Publikováno v:
Microporous and Mesoporous Materials. 53:179-193
A new form of crystalline silica has been prepared and is designated MCM-69. The material has a crystalline layered structure which can be delaminated and which contains a regular array of reactive, surface silanols. Specifically, one out of every th
Publikováno v:
The Journal of Physical Chemistry B. 104:721-726
Publikováno v:
Zeolites. 17:393-400
Zeolite ECR-1 has been synthesized from a low SiO 2 /Al 2 O 3 reaction mixture in the presence of adamantane-containing diquaternary alkylammonium iodides with the following structures. ECR-1 was first prepared by Vaughan and Strohmaier in 1987 (US P
Publikováno v:
Zeolites. 10:293-296
ZSM-57 is a new zeolitic phase with a novel framework topology: structure code MFS, space group lmm2, a = 7.4510(7)A, b = 14.1711(8)A, c = 18.767(2)A, 18.2T/1000 A3. Although the structure is closely related to ZSM-35 (FER), ZSM-57 has 4-rings lackin
Publikováno v:
Zeolites. 10:522-524
The framework topology of AIPO 4 -8, a synthetic aluminophosphate molecular sieve, has been determined via model building followed by DLS-refinement and powder pattern simulation. AIPO 4 -8 has been shown to possess a unidimensional 14-ring channel s
Publikováno v:
MRS Proceedings. 233
The synthesis of materials with void volumes in excess of 50% is an ongoing challenge in molecular sieve science. It has been shown that a correlation exists between the minimum framework density (FD) and the smallest ring in which all tetrahedral at
Publikováno v:
Journal of the Chemical Society, Chemical Communications. :894
Crystalline SUZ-4, with anhydrous composition K5Al5Si31O72, is hydrothermafly synthesized in a reaction mixture of SiO2, Al3, KOH, tetraethylammonium hydroxide and quinuclidine; its proposed framework topology is related to zeolites ferrierite and ZS
Publikováno v:
Journal of the Chemical Society, Chemical Communications. :1175
The synthesis of molecular sieves with framework densities (FD) lower than those currently attainable is an ongoing challenge in molecular sieve science. Currently, the minimum FD is 12.5 for CoAPO-501 which translates to a void space that occupies a
Publikováno v:
Physics and Chemistry of Minerals. 1:243-255
Thermal expansion coefficients ɛ1 and ɛ3 calculated for the hexagonal minerals indialite, emerald and beryl are, in general, small with ɛ3 being negative near room temperature. This unusual behavior leads to low volume coefficients of thermal expa