Structural studies of hydrated germanium X-type zeolite via Rietveld analysis of synchrotron powder X-ray diffraction data

Geoffrey M. Johnson; Yongjae Lee; Akhilesh Tripathi; John B. Parise

doi:10.1016/S1387-1811(99)00070-0

Structural studies of hydrated germanium X-type zeolite via Rietveld analysis of synchrotron powder X-ray diffraction data

Geoffrey M. Johnson, Yongjae Lee, Akhilesh Tripathi, John B. Parise

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19 Citations (Scopus)

Abstract

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 Na₉₆Al₉₆Ge₉₆O₃₈₄·wH ₂O, and the material possesses an ordered arrangement of Al and Ge in the framework. A cell parameter of 25.589(1)Å confirms the expected cell expansion over Low Silica X (LSX), although a smaller average framework T-O-T bond angle indicates greater relative cell collapse than for LSX. The distribution of sodium cations in the non-framework sites in NaGeX is significantly different from that in LSX, and appears to deviate from the proposed relationship between Al content and cation siting for hydrated aluminosilicate faujasite-type zeolites.

Original language	English
Pages (from-to)	195-204
Number of pages	10
Journal	Microporous and Mesoporous Materials
Volume	31
Issue number	1-2
DOIs	https://doi.org/10.1016/S1387-1811(99)00070-0
Publication status	Published - 1999 Oct

Bibliographical note

Funding Information:
This work was supported by the National Science Foundation grant DMR-9713375. We thank David E. Cox for his help with data collection at X7A, which is supported by a grant from the US-DOE Division of Chemistry and Materials Sciences. We are also grateful to Dr. David R. Corbin and the Dupont Company for the ICP analysis.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanics of Materials

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10.1016/S1387-1811(99)00070-0

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title = "Structural studies of hydrated germanium X-type zeolite via Rietveld analysis of synchrotron powder X-ray diffraction data",

abstract = "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 Na96Al96Ge96O384·wH 2O, and the material possesses an ordered arrangement of Al and Ge in the framework. A cell parameter of 25.589(1){\AA} confirms the expected cell expansion over Low Silica X (LSX), although a smaller average framework T-O-T bond angle indicates greater relative cell collapse than for LSX. The distribution of sodium cations in the non-framework sites in NaGeX is significantly different from that in LSX, and appears to deviate from the proposed relationship between Al content and cation siting for hydrated aluminosilicate faujasite-type zeolites.",

author = "Johnson, {Geoffrey M.} and Yongjae Lee and Akhilesh Tripathi and Parise, {John B.}",

note = "Funding Information: This work was supported by the National Science Foundation grant DMR-9713375. We thank David E. Cox for his help with data collection at X7A, which is supported by a grant from the US-DOE Division of Chemistry and Materials Sciences. We are also grateful to Dr. David R. Corbin and the Dupont Company for the ICP analysis. ",

year = "1999",

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doi = "10.1016/S1387-1811(99)00070-0",

language = "English",

volume = "31",

pages = "195--204",

journal = "Microporous and Mesoporous Materials",

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AU - Johnson, Geoffrey M.

AU - Lee, Yongjae

AU - Tripathi, Akhilesh

AU - Parise, John B.

N1 - Funding Information: This work was supported by the National Science Foundation grant DMR-9713375. We thank David E. Cox for his help with data collection at X7A, which is supported by a grant from the US-DOE Division of Chemistry and Materials Sciences. We are also grateful to Dr. David R. Corbin and the Dupont Company for the ICP analysis.

PY - 1999/10

Y1 - 1999/10

N2 - 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 Na96Al96Ge96O384·wH 2O, and the material possesses an ordered arrangement of Al and Ge in the framework. A cell parameter of 25.589(1)Å confirms the expected cell expansion over Low Silica X (LSX), although a smaller average framework T-O-T bond angle indicates greater relative cell collapse than for LSX. The distribution of sodium cations in the non-framework sites in NaGeX is significantly different from that in LSX, and appears to deviate from the proposed relationship between Al content and cation siting for hydrated aluminosilicate faujasite-type zeolites.

AB - 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 Na96Al96Ge96O384·wH 2O, and the material possesses an ordered arrangement of Al and Ge in the framework. A cell parameter of 25.589(1)Å confirms the expected cell expansion over Low Silica X (LSX), although a smaller average framework T-O-T bond angle indicates greater relative cell collapse than for LSX. The distribution of sodium cations in the non-framework sites in NaGeX is significantly different from that in LSX, and appears to deviate from the proposed relationship between Al content and cation siting for hydrated aluminosilicate faujasite-type zeolites.

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JO - Microporous and Mesoporous Materials

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IS - 1-2

ER -

Structural studies of hydrated germanium X-type zeolite via Rietveld analysis of synchrotron powder X-ray diffraction data

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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