TY - JOUR
T1 - Caracterización espectroscópica, química y morfológica y propiedades super ciales de una montmorillonita Mexicana
AU - Vargas-Rodríguez, Yolanda Marina
AU - Gómez-Vidales, Virginia
AU - Vázquez-Labastida, Eloy
AU - García-Bórquez, Arturo
AU - Aguilar-Sahagún, Guillermo
AU - Murrieta-Sánchez, Héctor
AU - Salmón, Manuel
PY - 2008
Y1 - 2008
N2 - The characterization by means of spectroscopic techniques of a natural montmorillonite collected at Cuencamé, Durango is described. The composition of the tetrahedral and octahedral layers was analyzed by magic angle spinning Nuclear Magnetic Resonance (NMR) for the nuclei of 29Si and 27Al. The superfacial properties of the clay were quantified using the technique of adsorption-desorption of nitrogen as well as the Brunahuer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) methods. The results indicate that the analyzed clay is a Na-montmorillonite with a molecular layer of water adsorbed between their laminae, where the Si atoms in the phyllosilicale Q3 structure display different composition of Si-nAl(n=0, 1 and 2). About 3.3% of the Al atoms in the structure are replacing Si atoms in the layer. The presence of the paramagnetic Fe+3 and Mn +2 ions in the structure was determined by electronic paramagnetic resonance after the analysis of the acidified clay treated with HCl and CF3SO3H, Additionally, the results acquired by atomic absorption, scanning electron microscopy, infrared and gravimetric thermal analysis are discussed.
AB - The characterization by means of spectroscopic techniques of a natural montmorillonite collected at Cuencamé, Durango is described. The composition of the tetrahedral and octahedral layers was analyzed by magic angle spinning Nuclear Magnetic Resonance (NMR) for the nuclei of 29Si and 27Al. The superfacial properties of the clay were quantified using the technique of adsorption-desorption of nitrogen as well as the Brunahuer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) methods. The results indicate that the analyzed clay is a Na-montmorillonite with a molecular layer of water adsorbed between their laminae, where the Si atoms in the phyllosilicale Q3 structure display different composition of Si-nAl(n=0, 1 and 2). About 3.3% of the Al atoms in the structure are replacing Si atoms in the layer. The presence of the paramagnetic Fe+3 and Mn +2 ions in the structure was determined by electronic paramagnetic resonance after the analysis of the acidified clay treated with HCl and CF3SO3H, Additionally, the results acquired by atomic absorption, scanning electron microscopy, infrared and gravimetric thermal analysis are discussed.
KW - Al
KW - Clay
KW - Electronic paramagnetic resonance
KW - Magic angle spinning (MAS)
KW - Montmorillonite
KW - Nuclear Magnetic Resonance (NMR)
KW - Si
KW - Thermal analysis
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=44849092476&partnerID=8YFLogxK
M3 - Artículo
SN - 1026-8774
VL - 25
SP - 135
EP - 144
JO - Revista Mexicana de Ciencias Geologicas
JF - Revista Mexicana de Ciencias Geologicas
IS - 1
ER -