Abstract
Li-analcime Li1.69Na0.14[Al1.83Si4.17O12] · 2.05H2O has been prepared and studied by single-crystal X-ray structural analysis: a = 13.510(2), b = 13.520(1), c = 13.503(2) Å, V = 2466.4(9) Å3, Z = 8, space group Pbca. The structure is compared with that of the starting Na-analcime. Lithium atoms lie near Na sites with a distorted octahedral coordination O4(H2O)2. Due to the smaller size of Li atoms, their real environment is differentiated into 3+3 or 4+2. The off-network cations and the H2O molecules are shifted from the sites which they normally occupy in analcime in a cooperative manner. The changes in the unit cell dimensions and symmetry are explained from crystal-chemical viewpoint.
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Seryotkin, Y.V., Bakakin, V.V., Belitskii, I.A. et al. Crystal Structure of Li-Analcime. Journal of Structural Chemistry 41, 1021–1029 (2000). https://doi.org/10.1023/A:1010367225056
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DOI: https://doi.org/10.1023/A:1010367225056