TY - CHAP
T1 - Investigation of cancrinite structures by powder neutron diffraction
AU - Weller, M.T.
AU - Kenyon, N.J.
PY - 2004
Y1 - 2004
N2 - Deuterated forms of cancrinite, [Na(CO).(D O)] [AlSiO] - CAN, and intermediate phase mixed disordered cancrinite-sodalite [Na (CO).(DO)] [AlSiO] - 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-membered ring channels, with water molecules co-ordinating to sodium in the 11-hedral ε-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 °C though this process, and decomposition of the aluminosilicate framework, occur at significantly lower temperatures for the disordered structure.
AB - Deuterated forms of cancrinite, [Na(CO).(D O)] [AlSiO] - CAN, and intermediate phase mixed disordered cancrinite-sodalite [Na (CO).(DO)] [AlSiO] - 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-membered ring channels, with water molecules co-ordinating to sodium in the 11-hedral ε-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 °C though this process, and decomposition of the aluminosilicate framework, occur at significantly lower temperatures for the disordered structure.
UR - http://www.scopus.com/inward/record.url?scp=11844295363&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1016/S0167-2991(04)80648-7
U2 - 10.1016/S0167-2991(04)80648-7
DO - 10.1016/S0167-2991(04)80648-7
M3 - Chapter or section
AN - SCOPUS:11844295363
T3 - Studies in Surface Science & Catalysis
SP - 1349
EP - 1355
BT - Recent Advances in the Science and Technology of Zeolites and Related Materials, Part B
PB - Elsevier
T2 - 14th International Zeolite Conference
Y2 - 25 April 2004 through 30 April 2004
ER -