Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Geoffrey M. Johnson"'
Publikováno v:
Estuaries and Coasts. 42:1211-1225
Environmental history recorded in estuarine sediment describes water quality regimes through the use of geochemical and biological proxies. We collected sediment cores from two locations in the Coos Estuary, Oregon, at South Slough and Haynes Inlet,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc719e44d6b80bf43fdf0e7a9dfedf0d
https://doi.org/10.1007/s12237-019-00580-8
https://doi.org/10.1007/s12237-019-00580-8
Autor:
John B. Parise, Sun Jin Kim, Geoffrey M. Johnson, Yongjae Lee, Akhilesh Tripathi, Young Sun Uh
Publikováno v:
Chemistry of Materials. 12:3760-3769
Two new aluminogermanates, K-AlGe-GIS (K 8 Al 8 Ge 8 O 32 .8H 2 O) and Na-AlGe-GIS (Na 24 Al 24 Ge 24 O 96 40H 2 O), with the zeolite gismondine (GIS) type framework topology have been synthesized hydrothermally and characterized using single-crystal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca25e80dfc3251bed002914ee7e7919f
https://doi.org/10.1021/cm000459s
https://doi.org/10.1021/cm000459s
Publikováno v:
Microporous and Mesoporous Materials. 38:445-460
The introduction of gallium and germanium into the sodalite framework has been achieved by hydrothermal and low temperature solution routes for a wide range of anions. This yields materials of general composition Na8[ABO4]6·X2, where A=Al and Ga, B=
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c67d9ceb9a115eccdb7d9d491663a2b9
https://doi.org/10.1016/s1387-1811(00)00169-4
https://doi.org/10.1016/s1387-1811(00)00169-4
Publikováno v:
Microporous and Mesoporous Materials. 37:165-174
An aluminogermanate possessing the zeolite JBW framework topology has been synthesized from a sodium- and rubidium-containing reagent mixture. The material, of composition Na2RbAl3Ge3O12·H2O, has been structurally characterized via single crystal X-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::771261add887d9663846aab0542922ea
https://doi.org/10.1016/s1387-1811(99)00263-2
https://doi.org/10.1016/s1387-1811(99)00263-2
Publikováno v:
Microporous and Mesoporous Materials. 37:153-163
Bulk zeolite JBW, Na2K[Al3Si3O12]·0.5H2O, has been synthesised under hydrothermal conditions (225°C) from a solution containing both sodium and potassium ions. The structure has been refined, at room temperature and at 4 K, from powder neutron diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93ea92bd24114711c6032ee07cf8e24d
https://doi.org/10.1016/s1387-1811(99)00262-0
https://doi.org/10.1016/s1387-1811(99)00262-0
Publikováno v:
Microporous and Mesoporous Materials. 34:273-279
An aluminogermanate possessing the zeolite ABW framework topology has been synthesized hydrothermally from lithium-containing gel mixtures. This material, of composition LiAlGeO4·H2O, has been structurally characterized by single-crystal X-ray diffr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f7802d2b515266882ff030e418f1df3
https://doi.org/10.1016/s1387-1811(99)00177-8
https://doi.org/10.1016/s1387-1811(99)00177-8
Publikováno v:
The Journal of Physical Chemistry B. 104:1454-1463
A wide range of sodalite framework materials, M{sub 8}[TT{prime}O{sub 4}]{sub 6}X{sub 2} where T = Al, Ga, Si, T{prime} = Be, Al, Si, Ge, have been characterized using {sup 27}Al, {sup 29}Si, and {sup 71}Ga magic angle spinning nuclear magnetic reson
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14f1aebcefeac22a3c2dc4829a9f8dcd
https://doi.org/10.1021/jp9929521
https://doi.org/10.1021/jp9929521
Publikováno v:
Journal of Materials Chemistry. 10:451-455
An aluminogermanate, Na2Al2Ge3O10·2H2O (NaAlGe-NAT), possessing the natrolite topology has been synthesized under hydrothermal conditions at 423 K from sodium- and tetramethylammonium-containing gels. Room temperature single crystal X-ray diffractio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa51fdb75d735c7411a2929cb2df1d87
https://doi.org/10.1039/a907933e
https://doi.org/10.1039/a907933e
Publikováno v:
Microporous and Mesoporous Materials. 31:195-204
An aluminogermanate analog of zeolite X has been synthesized by solution reaction, and characterized by Rietveld analysis of synchrotron powder X-ray diffraction data. The hydrated sample has a chemical formula Na 96 Al 96 Ge 96 O 384 · w H 2 O, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b46f43f34725aec1b2b78c9c7fad8edd
https://doi.org/10.1016/s1387-1811(99)00070-0
https://doi.org/10.1016/s1387-1811(99)00070-0
Autor:
John B. Parise, Akhilesh Tripathi, Barbara A. Reisner, David R. Corbin, Brian H. Toby, Geoffrey M. Johnson
Publikováno v:
Chemistry of Materials. 11:2780-2787
The influence of lithium substitution on the structure of aluminosilicate (AlSi) and aluminogermanate (AlGe) materials with the zeolite RHO topology has been examined. The exchanged materials were dehydrated and structurally characterized via Rietvel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9e69eb2ec64f70b8ec8c9b642b66bb6
https://doi.org/10.1021/cm990179g
https://doi.org/10.1021/cm990179g