Investigation of cancrinite structures by powder neutron diffraction
Investigation of cancrinite structures by powder neutron diffraction
Deuterated forms of cancrinite, [Na-8(CO3)•(D2O)n] [AlSiO4]6 - CAN, and intermediate phase mixed disordered cancrinite-sodalite [Na8-y(CO3)1-y/2•(D2O)n] [AlSiO4]6 - CAN/SOD, have been synthesised and studied using variable temperature, high resolution powder neutron diffraction. The structure of cancrinite shows anions are present only in the main 12-niembered ring channels, with water molecules co-ordinating to sodium in the 11-hedral epsilon-cages. In situ, powder neutron diffraction, studies of the thermal decomposition of cancrinite and the disordered cancrinite/sodalite show marked differences in their behaviours. Both materials undergo a lattice contraction as water is lost between 100 and 300 degrees C though this process, and decomposition of the aluminosilicate framework, OCCUr at significantly lower temperatures for the disordered structure.
temperature hydrothermal conditions, carbonate cancrinite, crystal-structure
0-444-51805-3
1349-1355
Weller, M.T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Kenyon, N.J.
3e49a794-89a5-490b-bf59-7d80f399bc0f
2004
Weller, M.T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Kenyon, N.J.
3e49a794-89a5-490b-bf59-7d80f399bc0f
Weller, M.T. and Kenyon, N.J.
(2004)
Investigation of cancrinite structures by powder neutron diffraction.
Steen, E. van, Callanan, L.H. and Claeys, M.
(eds.)
In Recent Advances in the Science and Technology of Zeolites and Related Materials, 154 (A,B,C).
vol. 154,
Elsevier.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Deuterated forms of cancrinite, [Na-8(CO3)•(D2O)n] [AlSiO4]6 - CAN, and intermediate phase mixed disordered cancrinite-sodalite [Na8-y(CO3)1-y/2•(D2O)n] [AlSiO4]6 - CAN/SOD, have been synthesised and studied using variable temperature, high resolution powder neutron diffraction. The structure of cancrinite shows anions are present only in the main 12-niembered ring channels, with water molecules co-ordinating to sodium in the 11-hedral epsilon-cages. In situ, powder neutron diffraction, studies of the thermal decomposition of cancrinite and the disordered cancrinite/sodalite show marked differences in their behaviours. Both materials undergo a lattice contraction as water is lost between 100 and 300 degrees C though this process, and decomposition of the aluminosilicate framework, OCCUr at significantly lower temperatures for the disordered structure.
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More information
Published date: 2004
Venue - Dates:
14th International Zeolite Conference, Cape Town, South Africa, 2004-04-25 - 2004-04-30
Keywords:
temperature hydrothermal conditions, carbonate cancrinite, crystal-structure
Identifiers
Local EPrints ID: 20337
URI: http://eprints.soton.ac.uk/id/eprint/20337
ISBN: 0-444-51805-3
PURE UUID: fa9f544f-b93e-45ac-b02d-58f62e41585e
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Date deposited: 16 Feb 2006
Last modified: 04 Jan 2024 04:25
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Contributors
Author:
M.T. Weller
Author:
N.J. Kenyon
Editor:
E. van Steen
Editor:
L.H. Callanan
Editor:
M. Claeys
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