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Characterization of the Solids Obtained by Pillaring of Griffithite (High Iron Content Saponite) with Al-Oligomers

Published online by Cambridge University Press:  28 February 2024

Miguel Angel Vicente ,
Mercedes Suarez ,
Miguel Angel Bañares-Muñoz  and
Jose Martin-Pozas
Miguel Angel Vicente
Affiliation:
Departamento de Química Inorgánica, Facultad de Química, Universidad de Salamanca, Plaza de la Merced S/N, 37008-Salamanca, Spain
Mercedes Suarez
Affiliation:
Area de Mineralogía y Cristalografía, Departamento de Geología, Facultad de Ciencias, Universidad de Salamanca, Plaza de la Merced S/N, 37008-Salamanca, Spain
Miguel Angel Bañares-Muñoz
Affiliation:
Departamento de Química Inorgánica, Facultad de Química, Universidad de Salamanca, Plaza de la Merced S/N, 37008-Salamanca, Spain
Jose Martin-Pozas
Affiliation:
Area de Mineralogía y Cristalografía, Departamento de Geología, Facultad de Ciencias, Universidad de Salamanca, Plaza de la Merced S/N, 37008-Salamanca, Spain
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Abstract

Griffithite, a high Fe content saponite (Griffith Park, California) was pillared with Al polymeric solutions, using different Al/clay ratios. The cation exchange began when Al-polycation solutions were added, being completed during the dialysis of the samples. Pillared solids were obtained by calcination of intercalated precursors at 500 °C. The content of A12O3 increased from 7.35% in the natural griffithite to about 14% in the pillared samples, equivalent to the fixation of about 1.4 mmol Al per g of clay. The surface areas of the pillared griffithite were between 230–300 m2 g-1. The intercalation and pillaring of griffithite were easier than that of a less-crystalline nonferrous saponite.

Keywords

Al13-Keggin PolycationGriffithiteIron-SaponitePillaringPorositySaponite
Type
Research Article
Information
Clays and Clay Minerals , Volume 45 , Issue 5 , October 1997 , pp. 761 - 768
Copyright
Copyright © 1997, The Clay Minerals Society

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