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García Romero, Emilia ; Súarez Barrios, Mercedes ; Bustillo Revuelta, María Ángeles | Clay Minerals Society | 2004Palygorskite in Miocene mudstones, palustrine limestones and calcretes from the Esquivias locality (Madrid Basin, Spain) has been analyzed by X-ray diffraction, infrared spectroscopy, scanning electron microscopy, transmission electron microscop[...]texto impreso
García Romero, Emilia ; Súarez Barrios, Mercedes ; Santarén Rome, Julio ; Álvarez Berenguer, Antonio | Clay Minerals Society | 2007The Allou Kagne (Senegal) deposit consists of different proportions of palygorskite and sepiolite, and these are associated with small quantities of quartz and X-ray amorphous silica as impurities. No pure palygorskite or sepiolite has been reco[...]texto impreso
García Romero, Emilia ; Súarez Barrios, Mercedes ; Oyarzun, Roberto ; López García, José Ángel ; Regueiro, M. | Clay Minerals Society | 2006Palygorskite fibers growing along fault planes in the outcrops of a large fault zone in SE Spain (Carboneras Fault Zone: CFZ; Serrata de NõÂjar) were studied by X-ray diffraction, scanning electron microscopy-energy dispersive X-ray analysis, an[...]texto impreso
Fernández Caliani, J.C. ; Crespo Feo, Elena ; Rodas, Magdalena ; Fernández Barrenechea, José María ; Luque del Villar, Francisco Javier | Clay Minerals Society | 2004This paper describes a rare occurrence of nontronite associated with sulfide-bearing felsic metavolcanics, providing evidence of colloidal deposition in open spaces as result of a low-temperature water-rock interaction. Microbotryoidal masses of[...]texto impreso
Santiago Buey, Cristina de ; Súarez Barrios, Mercedes ; García Romero, Emilia ; Doval, Mercedes | Clay Minerals Society | 2000The pink clays from the Tagus basin, Spain, were characterized by X-ray difraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Chemical data were obtained by plasma emission [...]texto impreso
Many studies of the chemical composition of sepiolite and palygorskite have been carried out using analytical electron microscopy (AEM). According to the literature, a compositional gap exists between sepiolites and palygorskites, but the result[...]
