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

Research output: Contribution to journalArticle

16 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 languageEnglish
Pages (from-to)195-204
Number of pages10
JournalMicroporous and Mesoporous Materials
Volume31
Issue number1-2
DOIs
Publication statusPublished - 1999 Jan 1

Fingerprint

Germanium
Rietveld analysis
Zeolites
Synchrotrons
Silicon Dioxide
X ray powder diffraction
germanium
synchrotrons
Silica
silicon dioxide
Cations
Positive ions
cells
diffraction
cations
x rays
Aluminosilicates
zeolites
Sodium
sodium

All Science Journal Classification (ASJC) codes

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

Cite this

@article{916cef1efc724cd58d47dcdb54a27616,
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.}",
year = "1999",
month = "1",
day = "1",
doi = "10.1016/S1387-1811(99)00070-0",
language = "English",
volume = "31",
pages = "195--204",
journal = "Microporous and Mesoporous Materials",
issn = "1387-1811",
publisher = "Elsevier",
number = "1-2",

}

Structural studies of hydrated germanium X-type zeolite via Rietveld analysis of synchrotron powder X-ray diffraction data. / Johnson, Geoffrey M.; Lee, Yongjae; Tripathi, Akhilesh; Parise, John B.

In: Microporous and Mesoporous Materials, Vol. 31, No. 1-2, 01.01.1999, p. 195-204.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Structural studies of hydrated germanium X-type zeolite via Rietveld analysis of synchrotron powder X-ray diffraction data

AU - Johnson, Geoffrey M.

AU - Lee, Yongjae

AU - Tripathi, Akhilesh

AU - Parise, John B.

PY - 1999/1/1

Y1 - 1999/1/1

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.

UR - http://www.scopus.com/inward/record.url?scp=0039136334&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0039136334&partnerID=8YFLogxK

U2 - 10.1016/S1387-1811(99)00070-0

DO - 10.1016/S1387-1811(99)00070-0

M3 - Article

VL - 31

SP - 195

EP - 204

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

SN - 1387-1811

IS - 1-2

ER -