Abstract

MACIAS LOPEZ, Mario Alberto; HENAO MARTINEZ, José Antonio  and  RIOS REYES, Carlos Alberto. Structural analysis of the natural clinker-based analcime (NC-ANA) by X-ray powder diffraction and solid-state ²⁹Si and ²⁷al nuclear magnetic resonance spectroscopy. Rev.fac.ing.univ. Antioquia [online]. 2011, n.61, pp.9-18. ISSN 0120-6230.

The natural clinker-based analcime (NC-ANA) framework was synthesized by the conventional hydrothermal alkaline activation method. The synthesized zeotype was characterized by X-ray powder diffraction (XRPD) analysis and solid-state ²⁹Si and ²⁷Al nuclear magnetic resonance (NMR) spectroscopy. XRPD data indicate that the NC-ANA zeotype framework crystallized in the rhombohedral space group R-3, with unit cell parameters a = 11,8995(6) Ǻ, α = 109,472(2)°, V = 1.300,69(1) Ǻ³, Z = 8. ²⁹Si NMR data reveal a number of resonance lines, with a full width at half height typically less than 2 ppm. The attribution of NMR lines to Qn groups was done by considering the stoichiometry and crystallographic data of the NC-ANA.

Keywords : Analcime; framework; natural clinker; Rieltveld method; NMR spectroscopy.

        · abstract in Spanish     · text in English     · English ( pdf )