Abstract
Various reaction products (faujasite, hydroxysodalite and zeolite P c), derived by hydrothermal synthesis from rhyolitic Lipari pumice, were investigated by means of X-ray diffraction, Mössbauer and e.p.r. spectroscopy to evaluate the distribution and structural configuration of iron. The relative amount of Fe 3+ derived from Mössbauer analysis may be considered as an approximate index of pumice dissolution accounting for iron contained in zeolites and in the aluminosilicate gel precursor. Strong analogies were found for the Fe 3+ coordinations in the original pumice and the different zeolitic structures of the reaction products. A large fraction of Fe from magnetically ordered phases is eliminated from the zeolitic products by dithionite extraction, whereas isomorphically substituted and exchangeable ferric ions are not appreciably affected.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
