Synthesis of short-range ordered aluminosilicates at ambient conditions.

ABSTRACT: We report here on structure-related aggregation effects of short-range ordered aluminosilicates (SROAS) that have to be considered in the development of synthesis protocols and may be relevant for the properties of SROAS in the environment. We synthesized SROAS of variable composition by neutralizing aqueous aluminium chloride with sodium orthosilicate at ambient temperature and pressure. We determined elemental composition, visualized morphology by microscopic techniques, and resolved mineral structure by solid-state ²⁹Si and ²⁷Al nuclear magnetic resonance and Fourier-transform infrared spectroscopy. Nitrogen sorption revealed substantial surface loss of Al-rich SROAS that resembled proto-imogolite formed in soils and sediments due to aggregation upon freezing. The

SUBMITTER: Lenhardt KR 

PROVIDER: S-EPMC7892816 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature