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Iron Influence in the Aluminosilicate Zeolites Synthesis
Al Coordination Iron Influence Kaolin Zeolite Synthesis
2011/12/8
Abstract: The level of Fe impurities in 2 well-crystallized kaolinites was modified (by addition or chemical removal treatment) to analyze the Fe influence in the aluminosilicate zeolite synthesis.The...
Solubility and stability of zeolites in aqueous solution: I. Analcime, Na-, and K-clinoptilolite
Solubility stability zeolites I. Analcime K-clinoptilolite
2012/3/31
The solubilities of analcime and clinoptilolite were determined in dilute, weakly alkaline,aqueous solutions below 300 8 C and at vapor-saturated pressures. Analcimes used in this study were from Mont...
Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite
Crystal structure-crystal chemistry relationships zeolites erionite offretite
2012/3/31
This study clarifies the crystal structure variations and relationships in the zeolites eri-onite and offretite. The crystal structure analyses used Rietveld analysis of X-ray powder diffraction data,...
Crystal chemistry of the zeolites erionite and offretite
Crystal chemistry zeolites erionite offretite
2012/3/31
Many known occurrences of the zeolites erionite and offretite have been characterized by electron probe microanalysis, X-ray powder diffraction, and optical microscopy. For the first time, a substanti...
Diagenesis of Oligocene Vitric Tuffs to Zeolites, Mexican Volcanic Belt
Diagenesis Oligocene Vitric Tuffs Zeolites
2011/12/23
Abstract: Sedimentary zeolites clinoptilolite, mordenite and erionite occur as diagenetic products of ash falls of rhyolitic composition from the Oligocene Chichindaro Formation at the limits of the M...
Thermochemistry and phase equilibria in calcium zeolites
Thermochemistry phase equilibria calcium zeolites
2012/4/6
Thermodynamic properties ofthe natural calcium zeolites laumontite, leonhardite, de-hydrated leonhardite (metaleonhardite), wairakite, and yugawaralite werestudied bycal-orimetry in lead borate solven...
Phase changes and amorphization of zeolites at high pressures: The case of scolecite and mesolite
Phase changes amorphization of zeolites high pressures scolecite mesolite
2012/4/6
Pressure-induced amorphous-phase transitions (amorphization) have been observed in framework silicates like quartz and feldspars. Asimilar crystalline to highly disordered solid phase transition is re...
Zeolites in Pre-Caldera Pyroclastic Rocks of the Santorini Volcano, Aegean Sea, Greece
Clinoptilolite Diagenesis Mordenite Pyroclastic Tuff Zeolite
2012/1/6
The vitric matrix of pre-caldera acid tuff and tuff breccia of the Santorini volcano, Aegean Sea, Greece has been generally replaced by one or more of the following authigenic minerals: K-rich and (K,...
Hypothetical Structures of Magadiite and Sodium Octosilicate and Structural Relationships Between the Layered Alkali Metal Silicates and the Mordenite- and Pentasil-Group Zeolites
Alkali metal silicate Bikitaite Crystal structure Dachiardite Epistilbite Infrared spectroscopy Magadiite Mordenite Nuclear magnetic resonance
2012/1/9
Hypothetical model structures for magadiite and sodium octosilicate, based on the structure of the zeolite dachiardite, are proposed that consist of layers of 6-member rings of tetrahedra and blocks c...
Zeolites in Eocene Basaltic Pillow Lavas of the Siletz River Volcanics, Central Coast Range, Oregon
Analcime Apophyllite Isotope abundance Laumontite Mesolite Pillow lava Smectite Zeolites
2012/1/13
Zeolites and associated minerals occur in a tholeiitic basaltic pillow lava sequence that makes up part of the Eocene Siletz River Volcanics in the central Coast Range, Oregon. Regional zoning of zeol...
Synthesis and Characterization of Zeolites in the System Na2O-K2O-Al2O3-SiO2-H2O
Gobbinsite Merlinoite Phillipsite Saline Alkaline lake Synthesis Zeolite Pt Zeolite W Zeolite ZK-19
2012/2/6
Zeolites having the structures of phillipsite, merlinoite, and gobbinsite were synthesized from clear solutions at 80°C in the system Na2O-K2O-Al2O3-SiO2-H2O and their morphologies, cell parameters, a...
Alteration of Clay Minerals and Zeolites in Hydrothermal Brines
Backfill Bentonite Cesium Clinoptilolite Hydrothermal Mordenite Salt repository Smectire Strontium Vermiculite Zeolite
2012/2/7
Clay minerals and zeolites, candidate backfill minerals for nuclear waste repositories, were treated with saturated NaCl brine and Mg-rich (Mg-Ca-Na-K) brine at 200∑C and 300∑C for 4 weeks under a con...
Hydrothermal Reactions of Strontium and Transuranic Simulator Elements with Clay Minerals, Zeolites, and Shales
Chlorite Clinoptilolite Hydrothermal treatment Illite Lanthanum Montmorillonite Neodymium Nuclear waste Shale Strontium Zeolite
2012/2/6
Reactions of Sr, La, and Nd (the latter two elements simulating Am and Cm) with potential backfill minerals for radioactive waste storage and with repository wall rocks, such as shale, were investigat...
Interaction of Uranyl Ions with Synthetic Zeolites of Type A and the Formation of Compreignacite-Like and Becquerelite-Like Products
Becquerelite Compreignacite Synthesis Uranium X-ray powder diffraction Zeolite A
2012/2/7
Uranyl acetatye solutions, ranging in concentration from about 100 ppm to 3700 ppm, were re-acted with the Na-, K-, and Ca- forms of zeolite A. The crystalline products from the Na- and K-A zeolites r...
Experiments on the Hydrothermal Formation of Calcium Zeolites
Calcium Hydrothermal Open system Si/Al ratio Synthesis Volcanic glass Zeolite
2012/2/8
The crystallization of calcium zeolites was carried out in an open hydrothermal system at 100°–250°C, using reactants that in nature are known to alter to calcium zeolites and 0.1 N CaCl2, 0.01 N CaCl...