Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Jürgen Felsche"'
Autor:
Stefanie Eiden-Aßmann, Günter Engelhardt, Peter Behrens, Michael Wiebcke, Andreas M. Schneider, Jürgen Felsche
Publikováno v:
Chemistry - A European Journal. 6:292-297
Ion exchange of the sodium hydro sodalites [Na3(H2O)4]2-[Al3Si3O12]2 [Na4(H3O2)]2[Al3Si3O12]2 and [Na4(OH)]2[Al3Si3O12]2 with aqueous Pb(NO3)2 solutions yielded, whichever reactant sodalite phase was used, the same lead hydro sodalite, [Pb2(OH)-(H2O)
Publikováno v:
Solid State Ionics. :1273-1277
This study deals with host-guest interactions in clathrasils. Silica sodalites with enclosed ethyleneglycol (EG), ethanolamine (EA) and ethylenediamine (ED), respectively, were chosen as a basic model system. The inclusion of the stereochemically sim
Autor:
Carola M. Braunbarth, Gerhard Wildermuth, Gianpietro van de Goor, Peter Behrens, Günter Engelhardt, Jürgen Felsche
Publikováno v:
Zeolites. 16:207-217
Two new clathrasils with sodalite structure were obtained using ethanolamine (EA) and ethylenediamine (ED), respectively, as structure-directing agents that also serve as solvents during the synthesis. Crystallization in the systems SiO 2 -Na 2 O-EA
Publikováno v:
Journal of Solid State Chemistry. 115:55-65
The phase transition behavior of anhydrous silver sodalite (ASS) Ag3[Al 3 Si 3 O 12 ] differs from that of other compounds with a sodalite structure in that the transition detected T c = 678 K by differential scanning calorimetry does not involve the
Publikováno v:
Microporous Materials. 2:493-500
A clathrasil with SOD structure has been obtained using 1,3-dioxolane as a template. The synthesis was achieved under hydrothermal conditions at temperatures between 423 and 433 K in the SiO 2 Na 2 OC 3 H 6 O 2 H 2 O system. The choice of th
Publikováno v:
Analytica Chimica Acta. 283:967-985
The application of high-resolution multinuclear solid state nuclear magnetic resonance (NMR) spectroscopy to the structural characterization of microporous host-guest systems is demonstrated by a series of sodalites with aluminosilicate, aluminate an
Autor:
Peter Sieger, Jürg Schefer, Günter Engelhardt, Michael Wiebcke, Jürgen Felsche, Peter Behrens
Publikováno v:
Zeitschrift f�r anorganische und allgemeine Chemie. 619:1321-1329
Crystalline sodium aluminogermanate hydroxosodalite hydrate Na6+x[Al6Ge6O24](OH)x · nH2O with x ≈ 1.6 and n ≈ 3.0 has been synthesized by reacting Al2O3, GeO2 and NaOH solution under hydrothermal conditions, and characterized by means of simulta
Publikováno v:
Zeolites. 11:558-562
The crystal structure of nitrite sodalite, Na 8 [AlSiO 4 ] 6 (NO 2 ) 2 [space group P 43 n , a 0 = 893.0(1) pm], has been determined by X-ray powder diffraction data at 295 K. The aluminosilicate framework shows regular bonding with values of Si-O =
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 47:498-501
Cristallisation dans P43m avec a=8,923 A, Z=1; affinement jusqu'a R=0,021. Le reseau sodalite est un arrangement ordonne et alterne de tetraedres AlO 4 et SiO 4 de sommets communs. Chaque cage [4 6 6 8 ] contient quatre cations Na qui entourent un an
Autor:
T. Tanaka, Z. U. Rek, Michael Fröba, Peter Behrens, Jürgen Felsche, M. Rowen, Joe Wong, P. Sieger
Publikováno v:
Physica B: Condensed Matter. :65-67
Using a YB 66 monochromator X-ray absorption measurements were carried out at the Al K and Si K absorption edges of a series of aluminosilicate sodalites. The AlOSi bridging angle of the selected sodalites varies from 138° to 148° and the str