Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Jürgen Felsche"'
Autor:
Jürgen Felsche, Michael Wiebcke
Publikováno v:
Microporous and Mesoporous Materials. 43:289-297
A reinvestigation of the crystal structure of the tetraethylammonium silicate hydrate with the approximate chemical composition (C8H20N)6[Si6O15] · 40.8H2O (1) is reported. The crystal structure of tetraethylammonium hydroxide nonahydrate, (C8H20N)O
Publikováno v:
Microporous Materials. 4:149-158
The phenyltrimethylammonium and benzyltrimethylammonium silicate hydrates with the approximate chemical compositions [NPhMe 3 ] 6 [Si 8 O 18 (OH) 2 ]·38.7H 2 O ( 1 ) and [NBnMe 3 ] 8 [Si 8 O 20 ]·53.6H 2 O (Ph=phenyl, Me=methyl, Bn=benzyl) ( 2 ) ha
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:
Zeitschrift f�r anorganische und allgemeine Chemie. 620:757-765
[TMPA]4[Si8O20] · 34 H2O (1) and [DDBO]4[Si8O20] · 32 H2O (2) have been prepared by crystallization from aqueous solutions of the respective quaternary alkylammonium hydroxide and SiO2. The crystal structures have been determined by single-crystal
Publikováno v:
Journal of Inclusion Phenomena and Molecular Recognition in Chemistry. 18:161-175
Single-crystal X-ray structure analyses of N(nPr)4[B5O6(OH)4][B(OH)3]2,1, and N(nBu)4 [B5O6(OH)4][B(OH)3]2,2, reveal that these materials are novel clathrates, the isotypic host structures of which are three-dimensional assemblies of hydrogen-bonded
Publikováno v:
Microporous Materials. 2:55-63
The tetramethylammonium silicate hydrate [NMe4]8[Si8O20]·65H2O (1 hereafter) crystallizes triclinically with space group P 1 , Z = 1 and the cell constants a = 15.644(3), b = 15.756(4), c = 15.967(5) A, α = 119.31(2), β = 108.83(2), γ = 91.99(2)
Publikováno v:
Zeitschrift für Naturforschung B. 48:978-985
X-ray structure analyses of crystalline [NMe4][B5O6(OH)4] · nH2O with n ≈ 0.25-0.50 (1), [NEt4][B5O6(OH)4] (2), [NPhMe3][B5O6(OH)4] (3), and [pipH][B5O6(OH)4] (4) reveal that these materials are novel clathrates with closely related three-dimensio
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:
Zeitschrift f�r anorganische und allgemeine Chemie. 619:1098-1104
A novel tetramethylammonium aluminosilicate hydrate with the approximate composition [NMe4]6[AlxSi8−xO18−x(OH)2+x] · 44H2O (x = 3–4) has been identified by powder X-ray diffraction as a component in a polyphasic solid mixture which crystallize
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 =