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

Growth of β-LiNaSO4 and Li2SO4 . H20: epitaxy and intergrowth phenomena Pina Martínez, Carlos Manuel Fernández Díaz, María Lourdes López García, José Ángel Prieto Rubio, Manuel 548.5 Crystal Growth Isotermal crystallization Cristalografía (Geología) 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. Depto. de Mineralogía y Petrología Fac. de Ciencias Geológicas TRUE pub 2023-06-20T16:49:04Z 2023-06-20T16:49:04Z 1995 journal article https://hdl.handle.net/20.500.14352/57120 0022-0248 10.1016/0022-0248(94)00963-5 eng open access application/pdf Elsevier Science B.V.