...Maurizio de Gennaro; Alessio Langella; Piergiulio Cappelletti; Carmine Colella Abstract Experiments on zeolitization were conducted on four synthetic monocationic glasses (Na, K, Ca, or Mg-rich glass) with Si/Al molar ratios of 2.67, similar in acidity to many volcanic glasses of partially...

... temperatures is also important for engineering applications of clays and for disposal of high-level radioactive waste. Simulations of XRD patterns for one-dimensionally disordered crystals were performed using model structures (Kakinoki and Komura, 1954; MacEwan, 1958 ; Reynolds and Hower, 1970...

... of ion exchange of alkali and alkaline earth cations in monocationic forms of mordenite and clinoptilolite at different temperatures ( Kirov et al. , 1989 , Petrova et al. , 1997 ). This work presents calorimetric data on mutual ion exchange in clinoptilolite of cationic pairs including K, Na, Ba...

... ): Zeolite chemistry and distribution in a Neapolitan yellow tuff deposit . Eur. J. Mineral ., 2 , 779 – 786 . de’ Gennaro , M. , Langella , A. , Cappelletti , P. , Colella , C. ( 1999 ): Hydrothermal conversion of trachytic glass to zeolite. 3. Monocationic model glasses . Clays...

... % parameter and the R 3 + / ( R 3 + + R 2 + + M + ) ratio ( R 3 + = Al 3 + + Fe 3 + ). These chemiographic representations, including 4Si, M + , R 2 + , and R 3 + , are calculated by monocationic molar...

... P , Colella C ( 1999b ) Hydrothermal conversion of trachytic glass to zeiolite. 3. Monocationic model glasses . Clays Clay Minerals 47 : 348 – 357 de’ Gennaro M , Petrosino P , Conte M. T , Munno R , Colella C ( 1990 ) Zeolite chemistry...

... to optimize the process ( Montgomery, 1997 ; Kuehl, 2000 ; Khuri & Mukhopadhyay, 2010 ). Simple regression models, according to RSM, were used to calculate the cation leaching from the K- and Ca-Cp, as a function of proposed process parameters. Moreover, principal component analysis (PCA) permitted...

...., & Colella, C. (1999) Hydrothermal conversion of trachytic glass to zeolite. 3. Monocationic model glasses . Clays and Clay Minerals 47 , 348 – 357 . Donovan, J.J., Singer...

... , A. , Cappelletti , P. and Colella , C. ( 1999 ) Hydrothermal conversion of trachytic glass to zeolite. 3. Monocationic model glasses . Clays and Clay Minerals , 47 , 348 – 357 . de la Fuente , S. , Cuadros , J. , Fiore , S. and Linares , J. ( 2000a ) Electron microscopy study...

... conversion of trachytic glass to zeolite. 3. Monocationic Model Glasses . Clays and Clay Minerals , 47 , 348 – 357 . de’Gennaro M. Cappelletti P. Alangella A. Perrotta A. Scarpati C. ( 2000 ) Genesis of zeolites in the Neapolitan Yellow Tuff: Geological, volcanological...

..., A., Cappelletti, P., and Colella, C. ( 1999 ) Hydrothermal conversion of trachytic glass to zeolite. Monocationic model glasses. Clays and Clay Minerals , 47 , 348 –357. Des Cloizeaux, M. ( 1883 ) Note sur les caractères optique de la christianite et de la phillipsite. Bulletin de la Société Français...

... ) Hydrothermal conversion of trachytic glass to zeolite. 3. Monocationic model glasses . Clays and Clay Minerals , 47 , 348 – 357 . de Gennaro , M. , Calcaterra , D. , Cappelletti , P. , Langella , A. , and Morra , V. ( 2000 ) Building stone and related weathering...

... on modern methods and with a general improvement of the whole structural model, augmented by Fourier Transform Infrared (FTIR) and Raman data which are completely lacking in the literature. The results will be analyzed within the context of a crystal-chemical survey of natural phosphates from the very...

... ) Hydrothermal conversion of trachytic glass to zeolite. 3. Monocationic model glasses . Clays and Clay Minerals , 47 ( 3 ), 348 – 357 . Downes , H. , Kostoula , T. , Jones , A.P. , Beard , A.D. , Thirlwall , M.F. , and Bodinier , J.L. ( 2002 ) Geochemistry and Sr-Nd isotopic...

... of other contaminants arose from studies demonstrating that strongly sorbing contaminants could travel much further and faster than would be anticipated from traditional solute transport models based on batch sorption data. For example, at the Nevada Test Site, surface-reactive radionuclides were observed...

... models for the adsorption of dye cations onto clay-mineral surfaces considered a purely parallel orientation of flat dye cations with respect to the plane of basal surfaces of clay-mineral particles (Garfinkel-Shweky & Yariv, 1997). Such an orientation would ensure an interaction with a maximal...

... ). Fig. 6. a A conceptual model of major bonding between a polyacrylamide (PAM) chain and exchangeable cations in the interlayer of smectite; b A conceptual model of a non-ionic PAM-smectite complex with d 001 spacing of ~1.5 nm. Water molecules are not shown (reproduced from Deng et al. ( 2006...