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oai:docta.ucm.es:20.500.14352/571202025-09-05T18:12:07Zcom_20.500.14352_14col_20.500.14352_15

Pina Martínez, Carlos Manuel Fernández Díaz, María Lourdes López García, José Ángel Prieto Rubio, Manuel 2023-06-20T16:49:04Z 2023-06-20T16:49:04Z 1995 0022-0248 10.1016/0022-0248(94)00963-5 https://hdl.handle.net/20.500.14352/57120 https://doi.org/10.1016/0022-0248(94)00963-5 Isothermal crystallization in the system Na2SO4-Li2SO4-H20 was carried out at 50°C by "salting out" in a tetrametoxysilane (TMS) gel medium. Under these conditions the solid phases that can crystallize are Na2SO4, Li2SO4 . H20 and β-LiNaSO4, depending on the initial composition of the gel interstitial solution. When the initial [Na2SO4]/[Li2SO4] molar ratio in the interstitial solution is smaller than 1, first β-LiNaSO4 crystallizes and, subsequently, Li2SO4 • H20. The nucleation of Li2SO4 • H20 is always heterogeneous and occurs epitaxially on the surface of β-LiNaSO4 crystals. Occasionally, successive heterogenous nucleation events promote the development of intergrowth phenomena. In this paper a detailed study of both epitactic growth and crystal morphology is worked out. Finally, the observed epitaxial relationships are interpreted on the ground of structural considerations. eng open access Growth of β-LiNaSO4 and Li2SO4 . H20: epitaxy and intergrowth phenomena journal article