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Title: On the space group of garronite. [61. 10. Bp. 3; 61. 10. Bp. 6; 07. 85. Yy; 61. 66. Va. 5; 61. 66. Rm. 1]

Abstract

The crystal structure of the natural zeolite garronite from Goble, Oregon has been refined using high resolution synchrotron X-ray powder diffraction data. Garronite has the same tetrahedral aluminosilicate framework as gismondine [GIS], and earlier structural models indicated a strong tetragonal pseudosymmetry. Proposed models in the literature were based on the I[bar 4]m2 and I4[sub 1]/a space groups, on account of symmetry lowering from the topological I4[sub 1]/amd space due to partial cation/water molecule order in the zeolitic cavities. Test structure analysis has been performed in all possible space subgroups including monoclinic space groups, and the refinement has been successfully carried out in space group I2/a (C2/c). The resulting monoclinic structure model is to be preferred over the tetragonal ones on the basis of: (1) lower agreement indices of the refinement; (2) a chemically sound framework geometry; and (3) a more satisfactory interpretation of the Ca atoms coordination in the extraframework cages. [copyright] [ital 1999 International Centre for Diffraction Data.]

Authors:
;  [1]
  1. (Dipartimento di Scienze della Terra, Universita di Milano, via Botticelli 23, I 20133 Milano (Italy))
Publication Date:
OSTI Identifier:
6441108
Resource Type:
Journal Article
Journal Name:
Powder Diffraction
Additional Journal Information:
Journal Volume: 14:3; Journal ID: ISSN 0885-7156
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM COMPOUNDS; CRYSTAL STRUCTURE; MINERALS; NSLS; POWDERS; SPACE GROUPS; SYNCHROTRON RADIATION; X-RAY DIFFRACTION; ZEOLITES; ACCELERATORS; ALKALINE EARTH METAL COMPOUNDS; BREMSSTRAHLUNG; COHERENT SCATTERING; CYCLIC ACCELERATORS; DIFFRACTION; ELECTROMAGNETIC RADIATION; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MATERIALS; RADIATION SOURCES; RADIATIONS; SCATTERING; SILICATE MINERALS; SYNCHROTRON RADIATION SOURCES; SYNCHROTRONS; 360602* - Other Materials- Structure & Phase Studies

Citation Formats

Artioli, G., and Marchi, M. On the space group of garronite. [61. 10. Bp. 3; 61. 10. Bp. 6; 07. 85. Yy; 61. 66. Va. 5; 61. 66. Rm. 1]. United States: N. p., 1999. Web. doi:10.1017/S0885715600010514.
Artioli, G., & Marchi, M. On the space group of garronite. [61. 10. Bp. 3; 61. 10. Bp. 6; 07. 85. Yy; 61. 66. Va. 5; 61. 66. Rm. 1]. United States. doi:10.1017/S0885715600010514.
Artioli, G., and Marchi, M. Wed . "On the space group of garronite. [61. 10. Bp. 3; 61. 10. Bp. 6; 07. 85. Yy; 61. 66. Va. 5; 61. 66. Rm. 1]". United States. doi:10.1017/S0885715600010514.
@article{osti_6441108,
title = {On the space group of garronite. [61. 10. Bp. 3; 61. 10. Bp. 6; 07. 85. Yy; 61. 66. Va. 5; 61. 66. Rm. 1]},
author = {Artioli, G. and Marchi, M.},
abstractNote = {The crystal structure of the natural zeolite garronite from Goble, Oregon has been refined using high resolution synchrotron X-ray powder diffraction data. Garronite has the same tetrahedral aluminosilicate framework as gismondine [GIS], and earlier structural models indicated a strong tetragonal pseudosymmetry. Proposed models in the literature were based on the I[bar 4]m2 and I4[sub 1]/a space groups, on account of symmetry lowering from the topological I4[sub 1]/amd space due to partial cation/water molecule order in the zeolitic cavities. Test structure analysis has been performed in all possible space subgroups including monoclinic space groups, and the refinement has been successfully carried out in space group I2/a (C2/c). The resulting monoclinic structure model is to be preferred over the tetragonal ones on the basis of: (1) lower agreement indices of the refinement; (2) a chemically sound framework geometry; and (3) a more satisfactory interpretation of the Ca atoms coordination in the extraframework cages. [copyright] [ital 1999 International Centre for Diffraction Data.]},
doi = {10.1017/S0885715600010514},
journal = {Powder Diffraction},
issn = {0885-7156},
number = ,
volume = 14:3,
place = {United States},
year = {1999},
month = {9}
}